445249857 has 16 divisors (see below), whose sum is σ = 672983360. Its totient is φ = 259578432.

The previous prime is 445249853. The next prime is 445249877. The reversal of 445249857 is 758942544.

It is not a de Polignac number, because 445249857 - 2² = 445249853 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (445249853) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 299698 + ... + 301179.

It is an arithmetic number, because the mean of its divisors is an integer number (42061460).

Almost surely, 2^445249857 is an apocalyptic number.

It is an amenable number.

445249857 is a deficient number, since it is larger than the sum of its proper divisors (227733503).

445249857 is a wasteful number, since it uses less digits than its factorization.

445249857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 600912.

The product of its digits is 1612800, while the sum is 48.

The square root of 445249857 is about 21100.9444575355. The cubic root of 445249857 is about 763.6035337991.

The spelling of 445249857 in words is "four hundred forty-five million, two hundred forty-nine thousand, eight hundred fifty-seven".