445746728 has 24 divisors (see below), whose sum is σ = 972229050. Its totient is φ = 191034144.

The previous prime is 445746713. The next prime is 445746767. The reversal of 445746728 is 827647544.

It can be written as a sum of positive squares in only one way, i.e., 385808164 + 59938564 = 19642^2 + 7742^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 568163 + ... + 568946.

Almost surely, 2^445746728 is an apocalyptic number.

It is an amenable number.

445746728 is an abundant number, since it is smaller than the sum of its proper divisors (526482322).

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

445746728 is a wasteful number, since it uses less digits than its factorization.

445746728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1137129 (or 1137118 counting only the distinct ones).

The product of its digits is 1505280, while the sum is 47.

The square root of 445746728 is about 21112.7148420093. The cubic root of 445746728 is about 763.8874728051.

The spelling of 445746728 in words is "four hundred forty-five million, seven hundred forty-six thousand, seven hundred twenty-eight".