87641808 has 20 divisors (see below), whose sum is σ = 226408128. Its totient is φ = 29213920.

The previous prime is 87641797. The next prime is 87641821. The reversal of 87641808 is 80814678.

It is a self number, because there is not a number n which added to its sum of digits gives 87641808.

It is a congruent number.

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, 912888 + ... + 912983.

Almost surely, 2^87641808 is an apocalyptic number.

It is an amenable number.

87641808 is an abundant number, since it is smaller than the sum of its proper divisors (138766320).

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

87641808 is a wasteful number, since it uses less digits than its factorization.

87641808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1825882 (or 1825876 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 42.

The square root of 87641808 is about 9361.7203547211. The cubic root of 87641808 is about 444.1917035982.

The spelling of 87641808 in words is "eighty-seven million, six hundred forty-one thousand, eight hundred eight".