86972540 has 24 divisors (see below), whose sum is σ = 182870352. Its totient is φ = 34745600.

The previous prime is 86972539. The next prime is 86972551. The reversal of 86972540 is 4527968.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17315 + ... + 21765.

It is an arithmetic number, because the mean of its divisors is an integer number (7619598).

Almost surely, 2^86972540 is an apocalyptic number.

It is an amenable number.

86972540 is an abundant number, since it is smaller than the sum of its proper divisors (95897812).

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

86972540 is a wasteful number, since it uses less digits than its factorization.

86972540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5437 (or 5435 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 86972540 is about 9325.9069264067. The cubic root of 86972540 is about 443.0581378891.

The spelling of 86972540 in words is "eighty-six million, nine hundred seventy-two thousand, five hundred forty".