Search a number
-
+
128883498 = 23192157379
BaseRepresentation
bin1111010111010…
…01101100101010
322222111221220220
413223221230222
5230443232443
620442230510
73123330432
oct753515452
9288457826
10128883498
116682a097
12371b5436
1320917533
141318d2c2
15b4aca83
hex7ae9b2a

128883498 has 48 divisors (see below), whose sum is σ = 274502880. Its totient is φ = 40334112.

The previous prime is 128883497. The next prime is 128883499. The reversal of 128883498 is 894388821.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (128883497) and next prime (128883499).

It is a super-4 number, since 4×1288834984 (a number of 34 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 128883498.

It is not an unprimeable number, because it can be changed into a prime (128883497) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 339873 + ... + 340251.

It is an arithmetic number, because the mean of its divisors is an integer number (5718810).

Almost surely, 2128883498 is an apocalyptic number.

128883498 is an abundant number, since it is smaller than the sum of its proper divisors (145619382).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128883498 is a wasteful number, since it uses less digits than its factorization.

128883498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579 (or 560 counting only the distinct ones).

The product of its digits is 884736, while the sum is 51.

The square root of 128883498 is about 11352.6868185465. The cubic root of 128883498 is about 505.1252808152.

The spelling of 128883498 in words is "one hundred twenty-eight million, eight hundred eighty-three thousand, four hundred ninety-eight".

Divisors: 1 2 3 6 19 38 57 114 157 314 361 379 471 722 758 942 1083 1137 2166 2274 2983 5966 7201 8949 14402 17898 21603 43206 56677 59503 113354 119006 136819 170031 178509 273638 340062 357018 410457 820914 1130557 2261114 3391671 6783342 21480583 42961166 64441749 128883498