47986618 has 4 divisors (see below), whose sum is σ = 71979930. Its totient is φ = 23993308.

The previous prime is 47986613. The next prime is 47986621. The reversal of 47986618 is 81668974.

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

It can be written as a sum of positive squares in only one way, i.e., 45468049 + 2518569 = 6743^2 + 1587^2 .

It is not an unprimeable number, because it can be changed into a prime (47986613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11996653 + ... + 11996656.

Almost surely, 2^47986618 is an apocalyptic number.

47986618 is a deficient number, since it is larger than the sum of its proper divisors (23993312).

47986618 is a wasteful number, since it uses less digits than its factorization.

47986618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23993311.

The product of its digits is 580608, while the sum is 49.

The square root of 47986618 is about 6927.2374002917. The cubic root of 47986618 is about 363.3903422221.

The spelling of 47986618 in words is "forty-seven million, nine hundred eighty-six thousand, six hundred eighteen".