47857718 has 4 divisors (see below), whose sum is σ = 71786580. Its totient is φ = 23928858.

The previous prime is 47857699. The next prime is 47857721. The reversal of 47857718 is 81775874.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×47857718² = 4580722344335048, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11964428 + ... + 11964431.

It is an arithmetic number, because the mean of its divisors is an integer number (17946645).

Almost surely, 2^47857718 is an apocalyptic number.

47857718 is a deficient number, since it is larger than the sum of its proper divisors (23928862).

47857718 is a wasteful number, since it uses less digits than its factorization.

47857718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23928861.

The product of its digits is 439040, while the sum is 47.

The square root of 47857718 is about 6917.9272907425. The cubic root of 47857718 is about 363.0646749099.

The spelling of 47857718 in words is "forty-seven million, eight hundred fifty-seven thousand, seven hundred eighteen".