172991460 has 24 divisors (see below), whose sum is σ = 484376256. Its totient is φ = 46131040.

The previous prime is 172991431. The next prime is 172991471. The reversal of 172991460 is 64199271.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1441536 + ... + 1441655.

It is an arithmetic number, because the mean of its divisors is an integer number (20182344).

Almost surely, 2^172991460 is an apocalyptic number.

172991460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172991460 is an abundant number, since it is smaller than the sum of its proper divisors (311384796).

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

172991460 is a wasteful number, since it uses less digits than its factorization.

172991460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2883203 (or 2883201 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 172991460 is about 13152.6217918710. The cubic root of 172991460 is about 557.1962967431.

The spelling of 172991460 in words is "one hundred seventy-two million, nine hundred ninety-one thousand, four hundred sixty".