172908632 has 48 divisors (see below), whose sum is σ = 371760840. Its totient is φ = 75099648.

The previous prime is 172908623. The next prime is 172908647. The reversal of 172908632 is 236809271.

It is a super-2 number, since 2×172908632² = 59794790040222848, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19223 + ... + 26745.

Almost surely, 2^172908632 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 172908632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (185880420).

172908632 is an abundant number, since it is smaller than the sum of its proper divisors (198852208).

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

172908632 is a wasteful number, since it uses less digits than its factorization.

172908632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7572 (or 7555 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 172908632 is about 13149.4726890473. The cubic root of 172908632 is about 557.1073543515.

The spelling of 172908632 in words is "one hundred seventy-two million, nine hundred eight thousand, six hundred thirty-two".