83640916 has 12 divisors (see below), whose sum is σ = 146662740. Its totient is φ = 41737280.

The previous prime is 83640847. The next prime is 83640923. The reversal of 83640916 is 61904638.

It can be written as a sum of positive squares in 2 ways, for example, as 52504516 + 31136400 = 7246^2 + 5580^2 .

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, 18505 + ... + 22576.

It is an arithmetic number, because the mean of its divisors is an integer number (12221895).

Almost surely, 2^83640916 is an apocalyptic number.

It is an amenable number.

83640916 is a deficient number, since it is larger than the sum of its proper divisors (63021824).

83640916 is a wasteful number, since it uses less digits than its factorization.

83640916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41594 (or 41592 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 83640916 is about 9145.5407713268. The cubic root of 83640916 is about 437.3269689631.

The spelling of 83640916 in words is "eighty-three million, six hundred forty thousand, nine hundred sixteen".