445331540 has 24 divisors (see below), whose sum is σ = 967445640. Its totient is φ = 171989888.

The previous prime is 445331527. The next prime is 445331561. The reversal of 445331540 is 45133544.

It can be written as a sum of positive squares in 4 ways, for example, as 41964484 + 403367056 = 6478^2 + 20084^2 .

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 383327 + ... + 384486.

It is an arithmetic number, because the mean of its divisors is an integer number (40310235).

Almost surely, 2^445331540 is an apocalyptic number.

It is an amenable number.

445331540 is an abundant number, since it is smaller than the sum of its proper divisors (522114100).

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

445331540 is a wasteful number, since it uses less digits than its factorization.

445331540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 767851 (or 767849 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 29.

The square root of 445331540 is about 21102.8798982509. The cubic root of 445331540 is about 763.6502263940.

The spelling of 445331540 in words is "four hundred forty-five million, three hundred thirty-one thousand, five hundred forty".