47323728 has 30 divisors (see below), whose sum is σ = 132441114. Its totient is φ = 15774528.

The previous prime is 47323709. The next prime is 47323747. The reversal of 47323728 is 82732374.

It is an interprime number because it is at equal distance from previous prime (47323709) and next prime (47323747).

It can be written as a sum of positive squares in only one way, i.e., 46131264 + 1192464 = 6792^2 + 1092^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 47323692 and 47323701.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 164175 + ... + 164462.

Almost surely, 2^47323728 is an apocalyptic number.

47323728 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

47323728 is an abundant number, since it is smaller than the sum of its proper divisors (85117386).

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

47323728 is a wasteful number, since it uses less digits than its factorization.

47323728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328651 (or 328642 counting only the distinct ones).

The product of its digits is 56448, while the sum is 36.

The square root of 47323728 is about 6879.2243748841. The cubic root of 47323728 is about 361.7092789119.

The spelling of 47323728 in words is "forty-seven million, three hundred twenty-three thousand, seven hundred twenty-eight".