447477978 has 16 divisors (see below), whose sum is σ = 947600640. Its totient is φ = 140385216.

The previous prime is 447477941. The next prime is 447478051. The reversal of 447477978 is 879774744.

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, 2193418 + ... + 2193621.

It is an arithmetic number, because the mean of its divisors is an integer number (59225040).

Almost surely, 2^447477978 is an apocalyptic number.

447477978 is an abundant number, since it is smaller than the sum of its proper divisors (500122662).

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

447477978 is a wasteful number, since it uses less digits than its factorization.

447477978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4387061.

The product of its digits is 11063808, while the sum is 57.

The square root of 447477978 is about 21153.6752835057. The cubic root of 447477978 is about 764.8751575507.

It can be divided in two parts, 44747 and 7978, that added together give a palindrome (52725).

The spelling of 447477978 in words is "four hundred forty-seven million, four hundred seventy-seven thousand, nine hundred seventy-eight".