920928172 has 6 divisors (see below), whose sum is σ = 1611624308. Its totient is φ = 460464084.

The previous prime is 920928167. The next prime is 920928193. The reversal of 920928172 is 271829029.

It is a super-3 number, since 3×920928172³ (a number of 28 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115116018 + ... + 115116025.

Almost surely, 2^920928172 is an apocalyptic number.

It is an amenable number.

920928172 is a deficient number, since it is larger than the sum of its proper divisors (690696136).

920928172 is a wasteful number, since it uses less digits than its factorization.

920928172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230232047 (or 230232045 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 920928172 is about 30346.7983813779. The cubic root of 920928172 is about 972.9157922708.

The spelling of 920928172 in words is "nine hundred twenty million, nine hundred twenty-eight thousand, one hundred seventy-two".