Search a number
-
+
30385488 = 2437212919
BaseRepresentation
bin111001111101…
…0010101010000
32010011202001110
41303322111100
530234313423
63003133320
7516162300
oct163722520
963152043
1030385488
1116174081
12a214240
1363ab5a3
14406d600
152a03193
hex1cfa550

30385488 has 60 divisors (see below), whose sum is σ = 91318560. Its totient is φ = 8680896.

The previous prime is 30385471. The next prime is 30385489. The reversal of 30385488 is 88458303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30385489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4108 + ... + 8811.

It is an arithmetic number, because the mean of its divisors is an integer number (1521976).

Almost surely, 230385488 is an apocalyptic number.

It is an amenable number.

30385488 is an abundant number, since it is smaller than the sum of its proper divisors (60933072).

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

30385488 is a wasteful number, since it uses less digits than its factorization.

30385488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12944 (or 12931 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 39.

The square root of 30385488 is about 5512.3033298250. The cubic root of 30385488 is about 312.0484803034.

The spelling of 30385488 in words is "thirty million, three hundred eighty-five thousand, four hundred eighty-eight".

Divisors: 1 2 3 4 6 7 8 12 14 16 21 24 28 42 48 49 56 84 98 112 147 168 196 294 336 392 588 784 1176 2352 12919 25838 38757 51676 77514 90433 103352 155028 180866 206704 271299 310056 361732 542598 620112 633031 723464 1085196 1266062 1446928 1899093 2170392 2532124 3798186 4340784 5064248 7596372 10128496 15192744 30385488