87113040 has 80 divisors (see below), whose sum is σ = 308635008. Its totient is φ = 19911168.

The previous prime is 87113027. The next prime is 87113041. The reversal of 87113040 is 4031178.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 87113040.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87113041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24247 + ... + 27606.

Almost surely, 2^87113040 is an apocalyptic number.

87113040 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

87113040 is an abundant number, since it is smaller than the sum of its proper divisors (221521968).

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

87113040 is a wasteful number, since it uses less digits than its factorization.

87113040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51876 (or 51870 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 87113040 is about 9333.4366660946. The cubic root of 87113040 is about 443.2965893128.

The spelling of 87113040 in words is "eighty-seven million, one hundred thirteen thousand, forty".