447257920 has 28 divisors (see below), whose sum is σ = 1065033684. Its totient is φ = 178903040.

The previous prime is 447257893. The next prime is 447257927. The reversal of 447257920 is 29752744.

It can be written as a sum of positive squares in 2 ways, for example, as 61842496 + 385415424 = 7864^2 + 19632^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (447257927) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 698521 + ... + 699160.

Almost surely, 2^447257920 is an apocalyptic number.

447257920 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

447257920 is an abundant number, since it is smaller than the sum of its proper divisors (617775764).

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

447257920 is a wasteful number, since it uses less digits than its factorization.

447257920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1397698 (or 1397688 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 40.

The square root of 447257920 is about 21148.4732309451. The cubic root of 447257920 is about 764.7497551067.

The spelling of 447257920 in words is "four hundred forty-seven million, two hundred fifty-seven thousand, nine hundred twenty".