Search a number
-
+
46991890 = 25112914731
BaseRepresentation
bin1011001101000…
…0101000010010
310021102102202101
42303100220102
544012220030
64355111014
71110265411
oct263205022
9107372671
1046991890
1124586780
12138a246a
13997416a
146353478
1541d37ca
hex2cd0a12

46991890 has 32 divisors (see below), whose sum is σ = 95463360. Its totient is φ = 16497600.

The previous prime is 46991849. The next prime is 46991929. The reversal of 46991890 is 9819964.

Together with 48471470 it forms an amicable pair .

It is a self number, because there is not a number n which added to its sum of digits gives 46991890.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4176 + ... + 10555.

It is an arithmetic number, because the mean of its divisors is an integer number (2983230).

Almost surely, 246991890 is an apocalyptic number.

46991890 is an abundant number, since it is smaller than the sum of its proper divisors (48471470).

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

46991890 is a wasteful number, since it uses less digits than its factorization.

46991890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14778.

The product of its (nonzero) digits is 139968, while the sum is 46.

The square root of 46991890 is about 6855.0630923428. The cubic root of 46991890 is about 360.8618496713.

It can be divided in two parts, 46 and 991890, that added together give a triangular number (991936 = T1408).

The spelling of 46991890 in words is "forty-six million, nine hundred ninety-one thousand, eight hundred ninety".

Divisors: 1 2 5 10 11 22 29 55 58 110 145 290 319 638 1595 3190 14731 29462 73655 147310 162041 324082 427199 810205 854398 1620410 2135995 4271990 4699189 9398378 23495945 46991890