172401440 has 48 divisors (see below), whose sum is σ = 428742720. Its totient is φ = 65329920.

The previous prime is 172401413. The next prime is 172401443. The reversal of 172401440 is 44104271.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (172401443) 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, 25316 + ... + 31395.

It is an arithmetic number, because the mean of its divisors is an integer number (8932140).

Almost surely, 2^172401440 is an apocalyptic number.

172401440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172401440 is an abundant number, since it is smaller than the sum of its proper divisors (256341280).

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

172401440 is a wasteful number, since it uses less digits than its factorization.

172401440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56745 (or 56737 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 23.

The square root of 172401440 is about 13130.1728853812. The cubic root of 172401440 is about 556.5621008289.

The spelling of 172401440 in words is "one hundred seventy-two million, four hundred one thousand, four hundred forty".