47788731 has 16 divisors (see below), whose sum is σ = 70960000. Its totient is φ = 31786344.

The previous prime is 47788729. The next prime is 47788771. The reversal of 47788731 is 13788774.

It is a happy number.

It is not a de Polignac number, because 47788731 - 2¹ = 47788729 is a prime.

It is a super-2 number, since 2×47788731² = 4567525621180722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47788711) 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, 11700 + ... + 15246.

It is an arithmetic number, because the mean of its divisors is an integer number (4435000).

Almost surely, 2^47788731 is an apocalyptic number.

47788731 is a deficient number, since it is larger than the sum of its proper divisors (23171269).

47788731 is a wasteful number, since it uses less digits than its factorization.

47788731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4055 (or 4049 counting only the distinct ones).

The product of its digits is 263424, while the sum is 45.

The square root of 47788731 is about 6912.9393892902. The cubic root of 47788731 is about 362.8901381901.

The spelling of 47788731 in words is "forty-seven million, seven hundred eighty-eight thousand, seven hundred thirty-one".