83956820 has 24 divisors (see below), whose sum is σ = 185589600. Its totient is φ = 31815072.

The previous prime is 83956813. The next prime is 83956837. The reversal of 83956820 is 2865938.

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, 110090 + ... + 110849.

It is an arithmetic number, because the mean of its divisors is an integer number (7732900).

Almost surely, 2^83956820 is an apocalyptic number.

It is an amenable number.

83956820 is an abundant number, since it is smaller than the sum of its proper divisors (101632780).

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

83956820 is a wasteful number, since it uses less digits than its factorization.

83956820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220967 (or 220965 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 83956820 is about 9162.7954249781. The cubic root of 83956820 is about 437.8768584137.

The spelling of 83956820 in words is "eighty-three million, nine hundred fifty-six thousand, eight hundred twenty".