181838972 has 24 divisors (see below), whose sum is σ = 370542816. Its totient is φ = 76459968.

The previous prime is 181838957. The next prime is 181838983. The reversal of 181838972 is 279838181.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59783 + ... + 62750.

It is an arithmetic number, because the mean of its divisors is an integer number (15439284).

Almost surely, 2^181838972 is an apocalyptic number.

It is an amenable number.

181838972 is an abundant number, since it is smaller than the sum of its proper divisors (188703844).

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

181838972 is a wasteful number, since it uses less digits than its factorization.

181838972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122597 (or 122595 counting only the distinct ones).

The product of its digits is 193536, while the sum is 47.

The square root of 181838972 is about 13484.7681478029. The cubic root of 181838972 is about 566.5379270787.

The spelling of 181838972 in words is "one hundred eighty-one million, eight hundred thirty-eight thousand, nine hundred seventy-two".