172428040 has 48 divisors (see below), whose sum is σ = 409491180. Its totient is φ = 65335680.

The previous prime is 172428019. The next prime is 172428049. The reversal of 172428040 is 40824271.

It can be written as a sum of positive squares in 2 ways, for example, as 165945924 + 6482116 = 12882^2 + 2546^2 .

It is not an unprimeable number, because it can be changed into a prime (172428049) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8470 + ... + 20410.

Almost surely, 2^172428040 is an apocalyptic number.

172428040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 172428040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (204745590).

172428040 is an abundant number, since it is smaller than the sum of its proper divisors (237063140).

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

172428040 is a wasteful number, since it uses less digits than its factorization.

172428040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11990 (or 11967 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 28.

The square root of 172428040 is about 13131.1857804236. The cubic root of 172428040 is about 556.5907235414.

The spelling of 172428040 in words is "one hundred seventy-two million, four hundred twenty-eight thousand, forty".