47408640 has 80 divisors (see below), whose sum is σ = 151584048. Its totient is φ = 12640256.

The previous prime is 47408573. The next prime is 47408657. The reversal of 47408640 is 4680474.

It is a tau number, because it is divible by the number of its divisors (80).

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, 4594 + ... + 10766.

Almost surely, 2^47408640 is an apocalyptic number.

47408640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 47408640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75792024).

47408640 is an abundant number, since it is smaller than the sum of its proper divisors (104175408).

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

47408640 is an equidigital number, since it uses as much as digits as its factorization.

47408640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6199 (or 6183 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 33.

The square root of 47408640 is about 6885.3932349576. The cubic root of 47408640 is about 361.9254855125.

The spelling of 47408640 in words is "forty-seven million, four hundred eight thousand, six hundred forty".