445244040 has 112 divisors (see below), whose sum is σ = 1502109900. Its totient is φ = 118723968.

The previous prime is 445244039. The next prime is 445244071. The reversal of 445244040 is 40442544.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 441252036 + 3992004 = 21006^2 + 1998^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 445243995 and 445244013.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 21526 + ... + 36794.

Almost surely, 2^445244040 is an apocalyptic number.

445244040 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 445244040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (751054950).

445244040 is an abundant number, since it is smaller than the sum of its proper divisors (1056865860).

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

445244040 is a wasteful number, since it uses less digits than its factorization.

445244040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15298 (or 15279 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 27.

The square root of 445244040 is about 21100.8066196532. The cubic root of 445244040 is about 763.6002083995.

Adding to 445244040 its reverse (40442544), we get a palindrome (485686584).

The spelling of 445244040 in words is "four hundred forty-five million, two hundred forty-four thousand, forty".