47278578 has 16 divisors (see below), whose sum is σ = 94636800. Its totient is φ = 15746256.

The previous prime is 47278571. The next prime is 47278589. The reversal of 47278578 is 87587274.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (47278571) 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, 6751 + ... + 11837.

It is an arithmetic number, because the mean of its divisors is an integer number (5914800).

Almost surely, 2^47278578 is an apocalyptic number.

47278578 is an abundant number, since it is smaller than the sum of its proper divisors (47358222).

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

47278578 is a wasteful number, since it uses less digits than its factorization.

47278578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6641.

The product of its digits is 878080, while the sum is 48.

The square root of 47278578 is about 6875.9419718319. The cubic root of 47278578 is about 361.5942106994.

The spelling of 47278578 in words is "forty-seven million, two hundred seventy-eight thousand, five hundred seventy-eight".