47918057 has 18 divisors (see below), whose sum is σ = 55638954. Its totient is φ = 41231520.

The previous prime is 47918041. The next prime is 47918077. The reversal of 47918057 is 75081974.

It can be written as a sum of positive squares in only one way, i.e., 36735721 + 11182336 = 6061^2 + 3344^2 .

It is not a de Polignac number, because 47918057 - 2⁴ = 47918041 is a prime.

It is a super-2 number, since 2×47918057² = 4592280373310498, which contains 22 as substring.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (47918027) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 43133 + ... + 44229.

It is an arithmetic number, because the mean of its divisors is an integer number (3091053).

Almost surely, 2^47918057 is an apocalyptic number.

It is an amenable number.

47918057 is a deficient number, since it is larger than the sum of its proper divisors (7720897).

47918057 is a wasteful number, since it uses less digits than its factorization.

47918057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1157 (or 1127 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 41.

The square root of 47918057 is about 6922.2869775819. The cubic root of 47918057 is about 363.2171947821.

The spelling of 47918057 in words is "forty-seven million, nine hundred eighteen thousand, fifty-seven".