87240704 has 78 divisors (see below), whose sum is σ = 187246260. Its totient is φ = 40624128.

The previous prime is 87240667. The next prime is 87240707. The reversal of 87240704 is 40704278.

It is a super-2 number, since 2×87240704² = 15221880868831232, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (87240707) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1478627 + ... + 1478685.

Almost surely, 2^87240704 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87240704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93623130).

87240704 is an abundant number, since it is smaller than the sum of its proper divisors (100005556).

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

87240704 is an equidigital number, since it uses as much as digits as its factorization.

87240704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121 (or 80 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 32.

The square root of 87240704 is about 9340.2732294082. The cubic root of 87240704 is about 443.5130337265.

87240704 divided by its sum of digits (32) gives a palindrome (2726272).

The spelling of 87240704 in words is "eighty-seven million, two hundred forty thousand, seven hundred four".