47924172 has 18 divisors (see below), whose sum is σ = 121141748. Its totient is φ = 15974712.

The previous prime is 47924143. The next prime is 47924179. The reversal of 47924172 is 27142974.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1331227 = 47924172 / (4 + 7 + 9 + 2 + 4 + 1 + 7 + 2).

It is not an unprimeable number, because it can be changed into a prime (47924179) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 665578 + ... + 665649.

Almost surely, 2^47924172 is an apocalyptic number.

It is an amenable number.

47924172 is an abundant number, since it is smaller than the sum of its proper divisors (73217576).

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

47924172 is a wasteful number, since it uses less digits than its factorization.

47924172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1331237 (or 1331232 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The square root of 47924172 is about 6922.7286527785. The cubic root of 47924172 is about 363.2326446202.

The spelling of 47924172 in words is "forty-seven million, nine hundred twenty-four thousand, one hundred seventy-two".