47391636 has 24 divisors (see below), whose sum is σ = 110918080. Its totient is φ = 15748992.

The previous prime is 47391623. The next prime is 47391637. The reversal of 47391636 is 63619374.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 47391594 and 47391603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47391637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1816 + ... + 9903.

Almost surely, 2^47391636 is an apocalyptic number.

It is an amenable number.

47391636 is an abundant number, since it is smaller than the sum of its proper divisors (63526444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

47391636 is a wasteful number, since it uses less digits than its factorization.

47391636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12063 (or 12061 counting only the distinct ones).

The product of its digits is 81648, while the sum is 39.

The square root of 47391636 is about 6884.1583363546. The cubic root of 47391636 is about 361.8822098784.

The spelling of 47391636 in words is "forty-seven million, three hundred ninety-one thousand, six hundred thirty-six".