87570730 has 24 divisors (see below), whose sum is σ = 170688492. Its totient is φ = 32333184.

The previous prime is 87570719. The next prime is 87570739. The reversal of 87570730 is 3707578.

It can be written as a sum of positive squares in 6 ways, for example, as 5650129 + 81920601 = 2377^2 + 9051^2 .

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 87570730.

It is not an unprimeable number, because it can be changed into a prime (87570739) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24219 + ... + 27598.

Almost surely, 2^87570730 is an apocalyptic number.

87570730 is a deficient number, since it is larger than the sum of its proper divisors (83117762).

87570730 is a wasteful number, since it uses less digits than its factorization.

87570730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51850 (or 51837 counting only the distinct ones).

The product of its (nonzero) digits is 41160, while the sum is 37.

The square root of 87570730 is about 9357.9233807507. The cubic root of 87570730 is about 444.0715904636.

The spelling of 87570730 in words is "eighty-seven million, five hundred seventy thousand, seven hundred thirty".