447400638 has 64 divisors (see below), whose sum is σ = 1070995200. Its totient is φ = 137985120.

The previous prime is 447400631. The next prime is 447400691. The reversal of 447400638 is 836004744.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (447400631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39048 + ... + 49188.

It is an arithmetic number, because the mean of its divisors is an integer number (16734300).

Almost surely, 2^447400638 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 447400638, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (535497600).

447400638 is an abundant number, since it is smaller than the sum of its proper divisors (623594562).

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

447400638 is a wasteful number, since it uses less digits than its factorization.

447400638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10214 (or 10208 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 36.

The square root of 447400638 is about 21151.8471533812. The cubic root of 447400638 is about 764.8310891973.

The spelling of 447400638 in words is "four hundred forty-seven million, four hundred thousand, six hundred thirty-eight".