47398640 has 20 divisors (see below), whose sum is σ = 110202024. Its totient is φ = 18959424.

The previous prime is 47398621. The next prime is 47398667. The reversal of 47398640 is 4689374.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

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, 296162 + ... + 296321.

Almost surely, 2^47398640 is an apocalyptic number.

47398640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

47398640 is an abundant number, since it is smaller than the sum of its proper divisors (62803384).

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

47398640 is a wasteful number, since it uses less digits than its factorization.

47398640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 592496 (or 592490 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 47398640 is about 6884.6670217230. The cubic root of 47398640 is about 361.9000364990.

The spelling of 47398640 in words is "forty-seven million, three hundred ninety-eight thousand, six hundred forty".