83199940 has 12 divisors (see below), whose sum is σ = 174719916. Its totient is φ = 33279968.

The previous prime is 83199937. The next prime is 83199973. The reversal of 83199940 is 4999138.

It can be written as a sum of positive squares in 2 ways, for example, as 26378496 + 56821444 = 5136^2 + 7538^2 .

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, 2079979 + ... + 2080018.

It is an arithmetic number, because the mean of its divisors is an integer number (14559993).

Almost surely, 2^83199940 is an apocalyptic number.

It is an amenable number.

83199940 is an abundant number, since it is smaller than the sum of its proper divisors (91519976).

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

83199940 is a wasteful number, since it uses less digits than its factorization.

83199940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4160006 (or 4160004 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 83199940 is about 9121.4001118249. The cubic root of 83199940 is about 436.5570482828.

The spelling of 83199940 in words is "eighty-three million, one hundred ninety-nine thousand, nine hundred forty".