47639388 has 24 divisors (see below), whose sum is σ = 113524992. Its totient is φ = 15541744.

The previous prime is 47639363. The next prime is 47639393. The reversal of 47639388 is 88393674.

It is a super-2 number, since 2×47639388² = 4539022578029088, which contains 22 as substring.

It is a congruent number.

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, 41670 + ... + 42797.

It is an arithmetic number, because the mean of its divisors is an integer number (4730208).

Almost surely, 2^47639388 is an apocalyptic number.

It is an amenable number.

47639388 is an abundant number, since it is smaller than the sum of its proper divisors (65885604).

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

47639388 is a wasteful number, since it uses less digits than its factorization.

47639388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84521 (or 84519 counting only the distinct ones).

The product of its digits is 870912, while the sum is 48.

The square root of 47639388 is about 6902.1292366921. The cubic root of 47639388 is about 362.5117250270.

The spelling of 47639388 in words is "forty-seven million, six hundred thirty-nine thousand, three hundred eighty-eight".