47172920 has 16 divisors (see below), whose sum is σ = 106139160. Its totient is φ = 18869152.

The previous prime is 47172901. The next prime is 47172941. The reversal of 47172920 is 2927174.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 589622 + ... + 589701.

Almost surely, 2^47172920 is an apocalyptic number.

47172920 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

47172920 is an abundant number, since it is smaller than the sum of its proper divisors (58966240).

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

47172920 is a wasteful number, since it uses less digits than its factorization.

47172920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1179334 (or 1179330 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 47172920 is about 6868.2545089710. The cubic root of 47172920 is about 361.3246466354.

The spelling of 47172920 in words is "forty-seven million, one hundred seventy-two thousand, nine hundred twenty".