47309988 has 48 divisors (see below), whose sum is σ = 125669376. Its totient is φ = 13712160.

The previous prime is 47309971. The next prime is 47309989. The reversal of 47309988 is 88990374.

It is not an unprimeable number, because it can be changed into a prime (47309989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4756 + ... + 10827.

It is an arithmetic number, because the mean of its divisors is an integer number (2618112).

Almost surely, 2^47309988 is an apocalyptic number.

It is an amenable number.

47309988 is an abundant number, since it is smaller than the sum of its proper divisors (78359388).

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

47309988 is a wasteful number, since it uses less digits than its factorization.

47309988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15624 (or 15622 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 48.

The square root of 47309988 is about 6878.2256432891. The cubic root of 47309988 is about 361.6742692261.

The spelling of 47309988 in words is "forty-seven million, three hundred nine thousand, nine hundred eighty-eight".