445231520 has 48 divisors (see below), whose sum is σ = 1060190208. Its totient is φ = 176682240.

The previous prime is 445231483. The next prime is 445231529. The reversal of 445231520 is 25132544.

It is a happy number.

It is a super-2 number, since 2×445231520² = 396462212803020800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 445231520.

It is not an unprimeable number, because it can be changed into a prime (445231529) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9365 + ... + 31275.

It is an arithmetic number, because the mean of its divisors is an integer number (22087296).

Almost surely, 2^445231520 is an apocalyptic number.

445231520 is a gapful number since it is divisible by the number (40) 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 445231520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (530095104).

445231520 is an abundant number, since it is smaller than the sum of its proper divisors (614958688).

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

445231520 is a wasteful number, since it uses less digits than its factorization.

445231520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22053 (or 22045 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 445231520 is about 21100.5099464444. The cubic root of 445231520 is about 763.5930510032.

The spelling of 445231520 in words is "four hundred forty-five million, two hundred thirty-one thousand, five hundred twenty".