444648915 has 12 divisors (see below), whose sum is σ = 770724864. Its totient is φ = 237146064.

The previous prime is 444648901. The next prime is 444648961. The reversal of 444648915 is 519846444.

It is not a de Polignac number, because 444648915 - 2⁴ = 444648899 is a prime.

It is a super-2 number, since 2×444648915² = 395425315221354450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 9881087 = 444648915 / (4 + 4 + 4 + 6 + 4 + 8 + 9 + 1 + 5).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4940499 + ... + 4940588.

It is an arithmetic number, because the mean of its divisors is an integer number (64227072).

Almost surely, 2^444648915 is an apocalyptic number.

444648915 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

444648915 is a deficient number, since it is larger than the sum of its proper divisors (326075949).

444648915 is a wasteful number, since it uses less digits than its factorization.

444648915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9881098 (or 9881095 counting only the distinct ones).

The product of its digits is 552960, while the sum is 45.

The square root of 444648915 is about 21086.6999551850. The cubic root of 444648915 is about 763.2598406051.

It can be divided in two parts, 4446 and 48915, that added together give a square (53361 = 231²).

The spelling of 444648915 in words is "four hundred forty-four million, six hundred forty-eight thousand, nine hundred fifteen".