87640808 has 16 divisors (see below), whose sum is σ = 164509380. Its totient is φ = 43771648.

The previous prime is 87640793. The next prime is 87640823. The reversal of 87640808 is 80804678.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (87640793) and next prime (87640823).

It can be written as a sum of positive squares in 2 ways, for example, as 87572164 + 68644 = 9358^2 + 262^2 .

It is a super-2 number, since 2×87640808² = 15361822453785728, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2210 + ... + 13422.

Almost surely, 2^87640808 is an apocalyptic number.

It is an amenable number.

87640808 is a deficient number, since it is larger than the sum of its proper divisors (76868572).

87640808 is a wasteful number, since it uses less digits than its factorization.

87640808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12196 (or 12192 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 41.

The square root of 87640808 is about 9361.6669455819. Note that the first 3 decimals coincide. The cubic root of 87640808 is about 444.1900141709.

The spelling of 87640808 in words is "eighty-seven million, six hundred forty thousand, eight hundred eight".