86787988 has 12 divisors (see below), whose sum is σ = 173576032. Its totient is φ = 37194840.

The previous prime is 86787983. The next prime is 86788001. The reversal of 86787988 is 88978768.

86787988 is an admirable number.

It is a super-2 number, since 2×86787988² = 15064309722176288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86787983) 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, 1549758 + ... + 1549813.

Almost surely, 2^86787988 is an apocalyptic number.

It is an amenable number.

86787988 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

86787988 is a wasteful number, since it uses less digits than its factorization.

86787988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3099582 (or 3099580 counting only the distinct ones).

The product of its digits is 10838016, while the sum is 61.

The square root of 86787988 is about 9316.0070845830. The cubic root of 86787988 is about 442.7445325094.

The spelling of 86787988 in words is "eighty-six million, seven hundred eighty-seven thousand, nine hundred eighty-eight".