86649972 has 24 divisors (see below), whose sum is σ = 202334496. Its totient is φ = 28861728.

The previous prime is 86649943. The next prime is 86649977. The reversal of 86649972 is 27994668.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86649977) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27763 + ... + 30725.

It is an arithmetic number, because the mean of its divisors is an integer number (8430604).

Almost surely, 2^86649972 is an apocalyptic number.

It is an amenable number.

86649972 is an abundant number, since it is smaller than the sum of its proper divisors (115684524).

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

86649972 is a wasteful number, since it uses less digits than its factorization.

86649972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5407 (or 5405 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 51.

The square root of 86649972 is about 9308.5966718942. The cubic root of 86649972 is about 442.5097141089.

The spelling of 86649972 in words is "eighty-six million, six hundred forty-nine thousand, nine hundred seventy-two".