181472920 has 32 divisors (see below), whose sum is σ = 410469120. Its totient is φ = 72206080.

The previous prime is 181472903. The next prime is 181472927. The reversal of 181472920 is 29274181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181472927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4237 + ... + 19516.

It is an arithmetic number, because the mean of its divisors is an integer number (12827160).

Almost surely, 2^181472920 is an apocalyptic number.

181472920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

181472920 is an abundant number, since it is smaller than the sum of its proper divisors (228996200).

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

181472920 is a wasteful number, since it uses less digits than its factorization.

181472920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23955 (or 23951 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 181472920 is about 13471.1885147525. The cubic root of 181472920 is about 566.1575142107.

The spelling of 181472920 in words is "one hundred eighty-one million, four hundred seventy-two thousand, nine hundred twenty".