83993400 has 72 divisors (see below), whose sum is σ = 282083880. Its totient is φ = 22397760.

The previous prime is 83993389. The next prime is 83993417. The reversal of 83993400 is 439938.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 21532 + ... + 25131.

Almost surely, 2^83993400 is an apocalyptic number.

It is an amenable number.

83993400 is an abundant number, since it is smaller than the sum of its proper divisors (198090480).

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

83993400 is a wasteful number, since it uses less digits than its factorization.

83993400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46685 (or 46673 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 83993400 is about 9164.7913233199. The cubic root of 83993400 is about 437.9404435192.

The spelling of 83993400 in words is "eighty-three million, nine hundred ninety-three thousand, four hundred".