47538440 has 32 divisors (see below), whose sum is σ = 107331480. Its totient is φ = 18949632.

The previous prime is 47538433. The next prime is 47538473. The reversal of 47538440 is 4483574.

It can be written as a sum of positive squares in 4 ways, for example, as 7873636 + 39664804 = 2806^2 + 6298^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 47538440.

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, 10622 + ... + 14418.

Almost surely, 2^47538440 is an apocalyptic number.

47538440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

47538440 is an abundant number, since it is smaller than the sum of its proper divisors (59793040).

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

47538440 is a wasteful number, since it uses less digits than its factorization.

47538440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4121 (or 4117 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 35.

The square root of 47538440 is about 6894.8125427745. The cubic root of 47538440 is about 362.2554894916.

The spelling of 47538440 in words is "forty-seven million, five hundred thirty-eight thousand, four hundred forty".