87807906 has 12 divisors (see below), whose sum is σ = 190250502. Its totient is φ = 29269296.

The previous prime is 87807899. The next prime is 87807943. The reversal of 87807906 is 60970878.

It can be written as a sum of positive squares in only one way, i.e., 68807025 + 19000881 = 8295^2 + 4359^2 .

It is a super-2 number, since 2×87807906² = 15420456712209672, which contains 22 as substring.

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 Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2439091 + ... + 2439126.

Almost surely, 2^87807906 is an apocalyptic number.

87807906 is an abundant number, since it is smaller than the sum of its proper divisors (102442596).

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

87807906 is a wasteful number, since it uses less digits than its factorization.

87807906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4878225 (or 4878222 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 45.

The square root of 87807906 is about 9370.5872814888. The cubic root of 87807906 is about 444.4721359459.

The spelling of 87807906 in words is "eighty-seven million, eight hundred seven thousand, nine hundred six".