47639880 has 64 divisors (see below), whose sum is σ = 158803200. Its totient is φ = 12703680.

The previous prime is 47639863. The next prime is 47639929. The reversal of 47639880 is 8893674.

It is a happy number.

47639880 is a `hidden beast` number, since 4 + 7 + 639 + 8 + 8 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20976 + ... + 23135.

It is an arithmetic number, because the mean of its divisors is an integer number (2481300).

Almost surely, 2^47639880 is an apocalyptic number.

47639880 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

47639880 is an abundant number, since it is smaller than the sum of its proper divisors (111163320).

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

47639880 is a wasteful number, since it uses less digits than its factorization.

47639880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44131 (or 44121 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 47639880 is about 6902.1648777757. The cubic root of 47639880 is about 362.5129729800.

The spelling of 47639880 in words is "forty-seven million, six hundred thirty-nine thousand, eight hundred eighty".