47421388 has 12 divisors (see below), whose sum is σ = 94842832. Its totient is φ = 20323440.

The previous prime is 47421371. The next prime is 47421401. The reversal of 47421388 is 88312474.

47421388 is an admirable number.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

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, 846783 + ... + 846838.

Almost surely, 2^47421388 is an apocalyptic number.

It is an amenable number.

47421388 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

47421388 is a wasteful number, since it uses less digits than its factorization.

47421388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1693632 (or 1693630 counting only the distinct ones).

The product of its digits is 43008, while the sum is 37.

The square root of 47421388 is about 6886.3189005448. The cubic root of 47421388 is about 361.9579227265.

The spelling of 47421388 in words is "forty-seven million, four hundred twenty-one thousand, three hundred eighty-eight".