47808136 has 8 divisors (see below), whose sum is σ = 89640270. Its totient is φ = 23904064.

The previous prime is 47808133. The next prime is 47808139. The reversal of 47808136 is 63180874.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (47808133) and next prime (47808139).

It can be written as a sum of positive squares in only one way, i.e., 47527236 + 280900 = 6894^2 + 530^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 47808095 and 47808104.

It is not an unprimeable number, because it can be changed into a prime (47808133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2988001 + ... + 2988016.

Almost surely, 2^47808136 is an apocalyptic number.

It is an amenable number.

47808136 is a deficient number, since it is larger than the sum of its proper divisors (41832134).

47808136 is a wasteful number, since it uses less digits than its factorization.

47808136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5976023 (or 5976019 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 47808136 is about 6914.3427742628. The cubic root of 47808136 is about 362.9392497000.

The spelling of 47808136 in words is "forty-seven million, eight hundred eight thousand, one hundred thirty-six".