83539920 has 40 divisors (see below), whose sum is σ = 258974496. Its totient is φ = 22277248.

The previous prime is 83539909. The next prime is 83540003. The reversal of 83539920 is 2993538.

It is a tau number, because it is divible by the number of its divisors (40).

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, 173802 + ... + 174281.

Almost surely, 2^83539920 is an apocalyptic number.

83539920 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

83539920 is an abundant number, since it is smaller than the sum of its proper divisors (175434576).

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

83539920 is a wasteful number, since it uses less digits than its factorization.

83539920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348099 (or 348093 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 39.

The square root of 83539920 is about 9140.0175054537. The cubic root of 83539920 is about 437.1508746691.

It can be divided in two parts, 835 and 39920, that added together give a triangular number (40755 = T₂₈₅).

The spelling of 83539920 in words is "eighty-three million, five hundred thirty-nine thousand, nine hundred twenty".