445251440 has 20 divisors (see below), whose sum is σ = 1035209784. Its totient is φ = 178100544.

The previous prime is 445251409. The next prime is 445251449. The reversal of 445251440 is 44152544.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445251449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2782742 + ... + 2782901.

Almost surely, 2^445251440 is an apocalyptic number.

445251440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

445251440 is an abundant number, since it is smaller than the sum of its proper divisors (589958344).

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

445251440 is a wasteful number, since it uses less digits than its factorization.

445251440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5565656 (or 5565650 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 29.

The square root of 445251440 is about 21100.9819676716. The cubic root of 445251440 is about 763.6044387464.

The spelling of 445251440 in words is "four hundred forty-five million, two hundred fifty-one thousand, four hundred forty".