87031700 has 72 divisors (see below), whose sum is σ = 218152704. Its totient is φ = 29520000.

The previous prime is 87031691. The next prime is 87031741. The reversal of 87031700 is 713078.

It is a self number, because there is not a number n which added to its sum of digits gives 87031700.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 70085 + ... + 71315.

Almost surely, 2^87031700 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 87031700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109076352).

87031700 is an abundant number, since it is smaller than the sum of its proper divisors (131121004).

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

87031700 is a wasteful number, since it uses less digits than its factorization.

87031700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1353 (or 1346 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 26.

The square root of 87031700 is about 9329.0781966923. The cubic root of 87031700 is about 443.1585733390.

Adding to 87031700 its reverse (713078), we get a palindrome (87744778).

The spelling of 87031700 in words is "eighty-seven million, thirty-one thousand, seven hundred".