172420488 has 40 divisors (see below), whose sum is σ = 482938830. Its totient is φ = 57473280.

The previous prime is 172420471. The next prime is 172420499. The reversal of 172420488 is 884024271.

172420488 is a `hidden beast` number, since 172 + 4 + 2 + 0 + 488 = 666.

It can be written as a sum of positive squares in only one way, i.e., 168428484 + 3992004 = 12978^2 + 1998^2 .

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

It is an unprimeable number.

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 9 ways as a sum of consecutive naturals, for example, 132393 + ... + 133688.

Almost surely, 2^172420488 is an apocalyptic number.

172420488 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

172420488 is an abundant number, since it is smaller than the sum of its proper divisors (310518342).

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

172420488 is a wasteful number, since it uses less digits than its factorization.

172420488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266099 (or 266086 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 36.

The square root of 172420488 is about 13130.8982175630. The cubic root of 172420488 is about 556.5825975728.

The spelling of 172420488 in words is "one hundred seventy-two million, four hundred twenty thousand, four hundred eighty-eight".