83640572 has 24 divisors (see below), whose sum is σ = 153177696. Its totient is φ = 39918528.

The previous prime is 83640563. The next prime is 83640587. The reversal of 83640572 is 27504638.

It is a happy number.

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, 2513 + ... + 13175.

It is an arithmetic number, because the mean of its divisors is an integer number (6382404).

Almost surely, 2^83640572 is an apocalyptic number.

It is an amenable number.

83640572 is a deficient number, since it is larger than the sum of its proper divisors (69537124).

83640572 is a wasteful number, since it uses less digits than its factorization.

83640572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10757 (or 10755 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 83640572 is about 9145.5219643277. The cubic root of 83640572 is about 437.3263694133.

The spelling of 83640572 in words is "eighty-three million, six hundred forty thousand, five hundred seventy-two".