47257128 has 32 divisors (see below), whose sum is σ = 131270400. Its totient is φ = 15752304.

The previous prime is 47257117. The next prime is 47257151. The reversal of 47257128 is 82175274.

It is a super-2 number, since 2×47257128² = 4466472293616768, which contains 22 as substring.

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 = 47257092 and 47257101.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109176 + ... + 109607.

It is an arithmetic number, because the mean of its divisors is an integer number (4102200).

Almost surely, 2^47257128 is an apocalyptic number.

It is an amenable number.

47257128 is an abundant number, since it is smaller than the sum of its proper divisors (84013272).

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

47257128 is a wasteful number, since it uses less digits than its factorization.

47257128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218798 (or 218788 counting only the distinct ones).

The product of its digits is 31360, while the sum is 36.

The square root of 47257128 is about 6874.3820085881. The cubic root of 47257128 is about 361.5395180710.

It can be divided in two parts, 472 and 57128, that added together give a square (57600 = 240²).

The spelling of 47257128 in words is "forty-seven million, two hundred fifty-seven thousand, one hundred twenty-eight".