47123478 has 16 divisors (see below), whose sum is σ = 104718960. Its totient is φ = 15707808.

The previous prime is 47123467. The next prime is 47123491. The reversal of 47123478 is 87432174.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 436275 + ... + 436382.

It is an arithmetic number, because the mean of its divisors is an integer number (6544935).

Almost surely, 2^47123478 is an apocalyptic number.

47123478 is an abundant number, since it is smaller than the sum of its proper divisors (57595482).

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

47123478 is a wasteful number, since it uses less digits than its factorization.

47123478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 872668 (or 872662 counting only the distinct ones).

The product of its digits is 37632, while the sum is 36.

The square root of 47123478 is about 6864.6542520363. The cubic root of 47123478 is about 361.1983675603.

The spelling of 47123478 in words is "forty-seven million, one hundred twenty-three thousand, four hundred seventy-eight".