47888721 has 24 divisors (see below), whose sum is σ = 74023040. Its totient is φ = 29743200.

The previous prime is 47888699. The next prime is 47888791. The reversal of 47888721 is 12788874.

It is not a de Polignac number, because 47888721 - 2⁵ = 47888689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47888791) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8136 + ... + 12726.

Almost surely, 2^47888721 is an apocalyptic number.

It is an amenable number.

47888721 is a deficient number, since it is larger than the sum of its proper divisors (26134319).

47888721 is a wasteful number, since it uses less digits than its factorization.

47888721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4677 (or 4674 counting only the distinct ones).

The product of its digits is 200704, while the sum is 45.

The square root of 47888721 is about 6920.1677002801. The cubic root of 47888721 is about 363.1430576998.

The spelling of 47888721 in words is "forty-seven million, eight hundred eighty-eight thousand, seven hundred twenty-one".