87620985 has 24 divisors (see below), whose sum is σ = 152530560. Its totient is φ = 46529952.

The previous prime is 87620969. The next prime is 87620993. The reversal of 87620985 is 58902678.

It is not a de Polignac number, because 87620985 - 2⁴ = 87620969 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 87620985.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6682 + ... + 14828.

It is an arithmetic number, because the mean of its divisors is an integer number (6355440).

Almost surely, 2^87620985 is an apocalyptic number.

It is an amenable number.

87620985 is a deficient number, since it is larger than the sum of its proper divisors (64909575).

87620985 is a wasteful number, since it uses less digits than its factorization.

87620985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8397 (or 8394 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 87620985 is about 9360.6081533200. The cubic root of 87620985 is about 444.1565220006.

The spelling of 87620985 in words is "eighty-seven million, six hundred twenty thousand, nine hundred eighty-five".