47718520 has 32 divisors (see below), whose sum is σ = 107619120. Its totient is φ = 19042560.

The previous prime is 47718511. The next prime is 47718521. The reversal of 47718520 is 2581774.

It is a happy number.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47718521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19780 + ... + 22060.

Almost surely, 2^47718520 is an apocalyptic number.

47718520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

47718520 is an abundant number, since it is smaller than the sum of its proper divisors (59900600).

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

47718520 is a wasteful number, since it uses less digits than its factorization.

47718520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2815 (or 2811 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 34.

The square root of 47718520 is about 6907.8592921396. The cubic root of 47718520 is about 362.7123322027.

The spelling of 47718520 in words is "forty-seven million, seven hundred eighteen thousand, five hundred twenty".