47720518 has 16 divisors (see below), whose sum is σ = 73172736. Its totient is φ = 23335560.

The previous prime is 47720467. The next prime is 47720537. The reversal of 47720518 is 81502774.

It is a happy number.

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, 15703 + ... + 18493.

It is an arithmetic number, because the mean of its divisors is an integer number (4573296).

Almost surely, 2^47720518 is an apocalyptic number.

47720518 is a deficient number, since it is larger than the sum of its proper divisors (25452218).

47720518 is a wasteful number, since it uses less digits than its factorization.

47720518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2979.

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

The square root of 47720518 is about 6908.0039085108. The cubic root of 47720518 is about 362.7173944519.

The spelling of 47720518 in words is "forty-seven million, seven hundred twenty thousand, five hundred eighteen".