47280728 has 16 divisors (see below), whose sum is σ = 96710760. Its totient is φ = 21491200.

The previous prime is 47280719. The next prime is 47280733. The reversal of 47280728 is 82708274.

It is a junction number, because it is equal to n+sod(n) for n = 47280691 and 47280700.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 268553 + ... + 268728.

Almost surely, 2^47280728 is an apocalyptic number.

It is an amenable number.

47280728 is an abundant number, since it is smaller than the sum of its proper divisors (49430032).

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

47280728 is a wasteful number, since it uses less digits than its factorization.

47280728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537298 (or 537294 counting only the distinct ones).

The product of its (nonzero) digits is 50176, while the sum is 38.

The square root of 47280728 is about 6876.0983122698. The cubic root of 47280728 is about 361.5996917989.

The spelling of 47280728 in words is "forty-seven million, two hundred eighty thousand, seven hundred twenty-eight".