83645872 has 20 divisors (see below), whose sum is σ = 165123360. Its totient is φ = 41033408.

The previous prime is 83645867. The next prime is 83645909. The reversal of 83645872 is 27854638.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48472 + ... + 50167.

It is an arithmetic number, because the mean of its divisors is an integer number (8256168).

Almost surely, 2^83645872 is an apocalyptic number.

It is an amenable number.

83645872 is a deficient number, since it is larger than the sum of its proper divisors (81477488).

83645872 is a wasteful number, since it uses less digits than its factorization.

83645872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98700 (or 98694 counting only the distinct ones).

The product of its digits is 322560, while the sum is 43.

The square root of 83645872 is about 9145.8117190329. The cubic root of 83645872 is about 437.3356064807.

The spelling of 83645872 in words is "eighty-three million, six hundred forty-five thousand, eight hundred seventy-two".