183972816 has 80 divisors (see below), whose sum is σ = 533051200. Its totient is φ = 60746112.

The previous prime is 183972809. The next prime is 183972823. The reversal of 183972816 is 618279381.

It is an interprime number because it is at equal distance from previous prime (183972809) and next prime (183972823).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45135 + ... + 49041.

It is an arithmetic number, because the mean of its divisors is an integer number (6663140).

Almost surely, 2^183972816 is an apocalyptic number.

183972816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 183972816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (266525600).

183972816 is an abundant number, since it is smaller than the sum of its proper divisors (349078384).

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

183972816 is a wasteful number, since it uses less digits than its factorization.

183972816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4033 (or 4021 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 183972816 is about 13563.6579137045. The cubic root of 183972816 is about 568.7453845618.

The spelling of 183972816 in words is "one hundred eighty-three million, nine hundred seventy-two thousand, eight hundred sixteen".