47312728 has 16 divisors (see below), whose sum is σ = 90775080. Its totient is φ = 23106048.

The previous prime is 47312723. The next prime is 47312731. The reversal of 47312728 is 82721374.

It is a junction number, because it is equal to n+sod(n) for n = 47312693 and 47312702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47312723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68425 + ... + 69112.

Almost surely, 2^47312728 is an apocalyptic number.

It is an amenable number.

47312728 is a deficient number, since it is larger than the sum of its proper divisors (43462352).

47312728 is a wasteful number, since it uses less digits than its factorization.

47312728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137586 (or 137582 counting only the distinct ones).

The product of its digits is 18816, while the sum is 34.

The square root of 47312728 is about 6878.4248196807. The cubic root of 47312728 is about 361.6812513202.

The spelling of 47312728 in words is "forty-seven million, three hundred twelve thousand, seven hundred twenty-eight".