86983640 has 16 divisors (see below), whose sum is σ = 195713280. Its totient is φ = 34793440.

The previous prime is 86983597. The next prime is 86983643. The reversal of 86983640 is 4638968.

It is a junction number, because it is equal to n+sod(n) for n = 86983591 and 86983600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86983643) 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, 1087256 + ... + 1087335.

It is an arithmetic number, because the mean of its divisors is an integer number (12232080).

Almost surely, 2^86983640 is an apocalyptic number.

It is an amenable number.

86983640 is an abundant number, since it is smaller than the sum of its proper divisors (108729640).

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

86983640 is a wasteful number, since it uses less digits than its factorization.

86983640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2174602 (or 2174598 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 44.

The square root of 86983640 is about 9326.5020238029. The cubic root of 86983640 is about 443.0769857389.

The spelling of 86983640 in words is "eighty-six million, nine hundred eighty-three thousand, six hundred forty".