445897872 has 200 divisors, whose sum is σ = 1539770496. Its totient is φ = 121803264.

The previous prime is 445897853. The next prime is 445897891. The reversal of 445897872 is 278798544.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (445897853) and next prime (445897891).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 207588 + ... + 209724.

Almost surely, 2^445897872 is an apocalyptic number.

445897872 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 445897872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (769885248).

445897872 is an abundant number, since it is smaller than the sum of its proper divisors (1093872624).

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

445897872 is a wasteful number, since it uses less digits than its factorization.

445897872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2187 (or 2172 counting only the distinct ones).

The product of its digits is 4515840, while the sum is 54.

The square root of 445897872 is about 21116.2939930282. The cubic root of 445897872 is about 763.9738028169.

The spelling of 445897872 in words is "four hundred forty-five million, eight hundred ninety-seven thousand, eight hundred seventy-two".