83861172 has 36 divisors (see below), whose sum is σ = 213400096. Its totient is φ = 27766800.

The previous prime is 83861161. The next prime is 83861179. The reversal of 83861172 is 27116838.

83861172 is a `hidden beast` number, since 8 + 38 + 611 + 7 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83861179) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2278 + ... + 13149.

Almost surely, 2^83861172 is an apocalyptic number.

It is an amenable number.

83861172 is an abundant number, since it is smaller than the sum of its proper divisors (129538924).

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

83861172 is a wasteful number, since it uses less digits than its factorization.

83861172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15588 (or 15583 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 83861172 is about 9157.5745697210. The cubic root of 83861172 is about 437.7105111550.

The spelling of 83861172 in words is "eighty-three million, eight hundred sixty-one thousand, one hundred seventy-two".