113291640 has 384 divisors, whose sum is σ = 473541120. Its totient is φ = 22809600.

The previous prime is 113291617. The next prime is 113291677. The reversal of 113291640 is 46192311.

113291640 is a `hidden beast` number, since 1 + 13 + 2 + 9 + 1 + 640 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1690887 + ... + 1690953.

It is an arithmetic number, because the mean of its divisors is an integer number (1233180).

Almost surely, 2^113291640 is an apocalyptic number.

113291640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 113291640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (236770560).

113291640 is an abundant number, since it is smaller than the sum of its proper divisors (360249480).

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

113291640 is a wasteful number, since it uses less digits than its factorization.

113291640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163 (or 156 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 113291640 is about 10643.8545649591. The cubic root of 113291640 is about 483.8743726040.

The spelling of 113291640 in words is "one hundred thirteen million, two hundred ninety-one thousand, six hundred forty".