445399616 has 14 divisors (see below), whose sum is σ = 883839990. Its totient is φ = 222699776.

The previous prime is 445399601. The next prime is 445399621. The reversal of 445399616 is 616993544.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 419430400 + 25969216 = 20480^2 + 5096^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3479621 + ... + 3479748.

Almost surely, 2^445399616 is an apocalyptic number.

It is an amenable number.

445399616 is a deficient number, since it is larger than the sum of its proper divisors (438440374).

445399616 is an equidigital number, since it uses as much as digits as its factorization.

445399616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6959381 (or 6959371 counting only the distinct ones).

The product of its digits is 699840, while the sum is 47.

The square root of 445399616 is about 21104.4927918204. The cubic root of 445399616 is about 763.6891364340.

The spelling of 445399616 in words is "four hundred forty-five million, three hundred ninety-nine thousand, six hundred sixteen".