447772780 has 96 divisors (see below), whose sum is σ = 1181174400. Its totient is φ = 141684480.

The previous prime is 447772739. The next prime is 447772781. The reversal of 447772780 is 87277744.

It is a self number, because there is not a number n which added to its sum of digits gives 447772780.

It is not an unprimeable number, because it can be changed into a prime (447772781) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 86670 + ... + 91690.

It is an arithmetic number, because the mean of its divisors is an integer number (12303900).

Almost surely, 2^447772780 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 447772780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (590587200).

447772780 is an abundant number, since it is smaller than the sum of its proper divisors (733401620).

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

447772780 is a wasteful number, since it uses less digits than its factorization.

447772780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5064 (or 5048 counting only the distinct ones).

The product of its (nonzero) digits is 614656, while the sum is 46.

The square root of 447772780 is about 21160.6422397809. The cubic root of 447772780 is about 765.0430892613.

The spelling of 447772780 in words is "four hundred forty-seven million, seven hundred seventy-two thousand, seven hundred eighty".