447720440 has 16 divisors (see below), whose sum is σ = 1007371080. Its totient is φ = 179088160.

The previous prime is 447720431. The next prime is 447720457. The reversal of 447720440 is 44027744.

It is a junction number, because it is equal to n+sod(n) for n = 447720397 and 447720406.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5596466 + ... + 5596545.

Almost surely, 2^447720440 is an apocalyptic number.

447720440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

447720440 is an abundant number, since it is smaller than the sum of its proper divisors (559650640).

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

447720440 is a wasteful number, since it uses less digits than its factorization.

447720440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11193022 (or 11193018 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 32.

The square root of 447720440 is about 21159.4054736895. The cubic root of 447720440 is about 765.0132795622.

The spelling of 447720440 in words is "four hundred forty-seven million, seven hundred twenty thousand, four hundred forty".