87031330 has 32 divisors (see below), whose sum is σ = 168167664. Its totient is φ = 32311296.

The previous prime is 87031327. The next prime is 87031331. The reversal of 87031330 is 3313078.

It can be written as a sum of positive squares in 8 ways, for example, as 68013009 + 19018321 = 8247^2 + 4361^2 .

It is a junction number, because it is equal to n+sod(n) for n = 87031295 and 87031304.

It is not an unprimeable number, because it can be changed into a prime (87031331) 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, 8904 + ... + 15916.

Almost surely, 2^87031330 is an apocalyptic number.

87031330 is a deficient number, since it is larger than the sum of its proper divisors (81136334).

87031330 is a wasteful number, since it uses less digits than its factorization.

87031330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7110.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 87031330 is about 9329.0583662018. The cubic root of 87031330 is about 443.1579453345.

The spelling of 87031330 in words is "eighty-seven million, thirty-one thousand, three hundred thirty".