47881784 has 32 divisors (see below), whose sum is σ = 93474000. Its totient is φ = 22966272.

The previous prime is 47881783. The next prime is 47881807. The reversal of 47881784 is 48718874.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47881781) 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, 40952 + ... + 42104.

Almost surely, 2^47881784 is an apocalyptic number.

It is an amenable number.

47881784 is a deficient number, since it is larger than the sum of its proper divisors (45592216).

47881784 is a wasteful number, since it uses less digits than its factorization.

47881784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1367 (or 1363 counting only the distinct ones).

The product of its digits is 401408, while the sum is 47.

The square root of 47881784 is about 6919.6664659505. Note that the first 3 decimals coincide. The cubic root of 47881784 is about 363.1255222900.

The spelling of 47881784 in words is "forty-seven million, eight hundred eighty-one thousand, seven hundred eighty-four".