83640512 has 28 divisors (see below), whose sum is σ = 173193456. Its totient is φ = 40001280.

The previous prime is 83640499. The next prime is 83640517. The reversal of 83640512 is 21504638.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (83640517) 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, 26939 + ... + 29882.

Almost surely, 2^83640512 is an apocalyptic number.

It is an amenable number.

83640512 is an abundant number, since it is smaller than the sum of its proper divisors (89552944).

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

83640512 is a wasteful number, since it uses less digits than its factorization.

83640512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56856 (or 56846 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 83640512 is about 9145.5186840332. The cubic root of 83640512 is about 437.3262648405.

The spelling of 83640512 in words is "eighty-three million, six hundred forty thousand, five hundred twelve".