83981900 has 36 divisors (see below), whose sum is σ = 191836680. Its totient is φ = 31824000.

The previous prime is 83981893. The next prime is 83981917. The reversal of 83981900 is 918938.

It is a super-2 number, since 2×83981900² = 14105919055220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20201 + ... + 24000.

Almost surely, 2^83981900 is an apocalyptic number.

It is an amenable number.

83981900 is an abundant number, since it is smaller than the sum of its proper divisors (107854780).

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

83981900 is a wasteful number, since it uses less digits than its factorization.

83981900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44234 (or 44227 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 38.

The square root of 83981900 is about 9164.1639007604. The cubic root of 83981900 is about 437.9204556592.

The spelling of 83981900 in words is "eighty-three million, nine hundred eighty-one thousand, nine hundred".