47878636 has 12 divisors (see below), whose sum is σ = 90232912. Its totient is φ = 22097808.

The previous prime is 47878591. The next prime is 47878639. The reversal of 47878636 is 63687874.

It is a self number, because there is not a number n which added to its sum of digits gives 47878636.

It is not an unprimeable number, because it can be changed into a prime (47878639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 460320 + ... + 460423.

Almost surely, 2^47878636 is an apocalyptic number.

It is an amenable number.

47878636 is a deficient number, since it is larger than the sum of its proper divisors (42354276).

47878636 is a wasteful number, since it uses less digits than its factorization.

47878636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 920760 (or 920758 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 49.

The square root of 47878636 is about 6919.4389946006. The cubic root of 47878636 is about 363.1175641892.

The spelling of 47878636 in words is "forty-seven million, eight hundred seventy-eight thousand, six hundred thirty-six".