447155220 has 24 divisors (see below), whose sum is σ = 1252034784. Its totient is φ = 119241376.

The previous prime is 447155207. The next prime is 447155273. The reversal of 447155220 is 22551744.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

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, 3726234 + ... + 3726353.

It is an arithmetic number, because the mean of its divisors is an integer number (52168116).

Almost surely, 2^447155220 is an apocalyptic number.

It is an amenable number.

447155220 is an abundant number, since it is smaller than the sum of its proper divisors (804879564).

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

447155220 is a wasteful number, since it uses less digits than its factorization.

447155220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7452599 (or 7452597 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 30.

The square root of 447155220 is about 21146.0450202869. The cubic root of 447155220 is about 764.6912163169.

The spelling of 447155220 in words is "four hundred forty-seven million, one hundred fifty-five thousand, two hundred twenty".