47731720 has 32 divisors (see below), whose sum is σ = 109897920. Its totient is φ = 18648000.

The previous prime is 47731711. The next prime is 47731727. The reversal of 47731720 is 2713774.

It is not an unprimeable number, because it can be changed into a prime (47731727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12156 + ... + 15595.

It is an arithmetic number, because the mean of its divisors is an integer number (3434310).

Almost surely, 2^47731720 is an apocalyptic number.

47731720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

47731720 is an abundant number, since it is smaller than the sum of its proper divisors (62166200).

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

47731720 is a wasteful number, since it uses less digits than its factorization.

47731720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27805 (or 27801 counting only the distinct ones).

The product of its (nonzero) digits is 8232, while the sum is 31.

The square root of 47731720 is about 6908.8146595491. The cubic root of 47731720 is about 362.7457738754.

The spelling of 47731720 in words is "forty-seven million, seven hundred thirty-one thousand, seven hundred twenty".