47728440 has 80 divisors (see below), whose sum is σ = 160431480. Its totient is φ = 12726720.

The previous prime is 47728397. The next prime is 47728441. The reversal of 47728440 is 4482774.

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 = 47728395 and 47728404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47728441) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4126 + ... + 10605.

Almost surely, 2^47728440 is an apocalyptic number.

47728440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

47728440 is an abundant number, since it is smaller than the sum of its proper divisors (112703040).

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

47728440 is a wasteful number, since it uses less digits than its factorization.

47728440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14754 (or 14741 counting only the distinct ones).

The product of its (nonzero) digits is 50176, while the sum is 36.

The square root of 47728440 is about 6908.5772775587. The cubic root of 47728440 is about 362.7374647021.

The spelling of 47728440 in words is "forty-seven million, seven hundred twenty-eight thousand, four hundred forty".