83400972 has 12 divisors (see below), whose sum is σ = 194602296. Its totient is φ = 27800320.

The previous prime is 83400971. The next prime is 83401001. The reversal of 83400972 is 27900438.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (83400971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3475029 + ... + 3475052.

It is an arithmetic number, because the mean of its divisors is an integer number (16216858).

Almost surely, 2^83400972 is an apocalyptic number.

It is an amenable number.

83400972 is an abundant number, since it is smaller than the sum of its proper divisors (111201324).

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

83400972 is a wasteful number, since it uses less digits than its factorization.

83400972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6950088 (or 6950086 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 83400972 is about 9132.4132626595. The cubic root of 83400972 is about 436.9083760453.

The spelling of 83400972 in words is "eighty-three million, four hundred thousand, nine hundred seventy-two".