87869868 has 12 divisors (see below), whose sum is σ = 205029720. Its totient is φ = 29289952.

The previous prime is 87869863. The next prime is 87869869. The reversal of 87869868 is 86896878.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×87869868² = 15442227404674848, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (87869863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3661233 + ... + 3661256.

It is an arithmetic number, because the mean of its divisors is an integer number (17085810).

Almost surely, 2^87869868 is an apocalyptic number.

It is an amenable number.

87869868 is an abundant number, since it is smaller than the sum of its proper divisors (117159852).

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

87869868 is a wasteful number, since it uses less digits than its factorization.

87869868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7322496 (or 7322494 counting only the distinct ones).

The product of its digits is 9289728, while the sum is 60.

The square root of 87869868 is about 9373.8928946303. The cubic root of 87869868 is about 444.5766592107.

The spelling of 87869868 in words is "eighty-seven million, eight hundred sixty-nine thousand, eight hundred sixty-eight".