172739472 has 20 divisors (see below), whose sum is σ = 446243760. Its totient is φ = 57579808.

The previous prime is 172739461. The next prime is 172739473. The reversal of 172739472 is 274937271.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (172739473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1799322 + ... + 1799417.

It is an arithmetic number, because the mean of its divisors is an integer number (22312188).

Almost surely, 2^172739472 is an apocalyptic number.

172739472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

172739472 is an abundant number, since it is smaller than the sum of its proper divisors (273504288).

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

172739472 is a wasteful number, since it uses less digits than its factorization.

172739472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3598750 (or 3598744 counting only the distinct ones).

The product of its digits is 148176, while the sum is 42.

The square root of 172739472 is about 13143.0389179976. The cubic root of 172739472 is about 556.9256186219.

The spelling of 172739472 in words is "one hundred seventy-two million, seven hundred thirty-nine thousand, four hundred seventy-two".