83939640 has 64 divisors (see below), whose sum is σ = 252547200. Its totient is φ = 22319232.

The previous prime is 83939573. The next prime is 83939683. The reversal of 83939640 is 4693938.

It is a junction number, because it is equal to n+sod(n) for n = 83939592 and 83939601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52371 + ... + 53949.

It is an arithmetic number, because the mean of its divisors is an integer number (3946050).

Almost surely, 2^83939640 is an apocalyptic number.

It is an amenable number.

83939640 is an abundant number, since it is smaller than the sum of its proper divisors (168607560).

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

83939640 is a wasteful number, since it uses less digits than its factorization.

83939640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2036 (or 2032 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 42.

The square root of 83939640 is about 9161.8578901880. The cubic root of 83939640 is about 437.8469889419.

The spelling of 83939640 in words is "eighty-three million, nine hundred thirty-nine thousand, six hundred forty".