172438272 has 54 divisors (see below), whose sum is σ = 497188692. Its totient is φ = 57478656.

The previous prime is 172438267. The next prime is 172438307. The reversal of 172438272 is 272834271.

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

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35118 + ... + 39725.

It is an arithmetic number, because the mean of its divisors is an integer number (9207198).

Almost surely, 2^172438272 is an apocalyptic number.

172438272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

172438272 is an abundant number, since it is smaller than the sum of its proper divisors (324750420).

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

172438272 is an equidigital number, since it uses as much as digits as its factorization.

172438272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74865 (or 74848 counting only the distinct ones).

The product of its digits is 37632, while the sum is 36.

The square root of 172438272 is about 13131.5753814994. The cubic root of 172438272 is about 556.6017328174.

The spelling of 172438272 in words is "one hundred seventy-two million, four hundred thirty-eight thousand, two hundred seventy-two".