47297447838 has 24 divisors (see below), whose sum is σ = 108505910448. Its totient is φ = 14838414912.

The previous prime is 47297447807. The next prime is 47297447843. The reversal of 47297447838 is 83874479274.

47297447838 is a `hidden beast` number, since 4 + 72 + 97 + 4 + 478 + 3 + 8 = 666.

47297447838 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 77283106 + ... + 77283717.

It is an arithmetic number, because the mean of its divisors is an integer number (4521079602).

Almost surely, 2^47297447838 is an apocalyptic number.

47297447838 is an abundant number, since it is smaller than the sum of its proper divisors (61208462610).

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

47297447838 is a wasteful number, since it uses less digits than its factorization.

47297447838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154566848 (or 154566845 counting only the distinct ones).

The product of its digits is 75866112, while the sum is 63.

The spelling of 47297447838 in words is "forty-seven billion, two hundred ninety-seven million, four hundred forty-seven thousand, eight hundred thirty-eight".