447619640 has 64 divisors (see below), whose sum is σ = 1122055200. Its totient is φ = 159570432.

The previous prime is 447619621. The next prime is 447619661. The reversal of 447619640 is 46916744.

It is a super-2 number, since 2×447619640² = 400726684227459200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 239 + ... + 29921.

Almost surely, 2^447619640 is an apocalyptic number.

447619640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 447619640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (561027600).

447619640 is an abundant number, since it is smaller than the sum of its proper divisors (674435560).

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

447619640 is a wasteful number, since it uses less digits than its factorization.

447619640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29736 (or 29732 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 447619640 is about 21157.0234201317. The cubic root of 447619640 is about 764.9558634311.

The spelling of 447619640 in words is "four hundred forty-seven million, six hundred nineteen thousand, six hundred forty".