445209768 has 24 divisors (see below), whose sum is σ = 1205776650. Its totient is φ = 148403232.

The previous prime is 445209763. The next prime is 445209799. The reversal of 445209768 is 867902544.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 360164484 + 85045284 = 18978^2 + 9222^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×445209768² = 396423475045227648, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (445209763) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 3091663 + ... + 3091806.

Almost surely, 2^445209768 is an apocalyptic number.

It is an amenable number.

445209768 is an abundant number, since it is smaller than the sum of its proper divisors (760566882).

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

445209768 is a wasteful number, since it uses less digits than its factorization.

445209768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6183481 (or 6183474 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The square root of 445209768 is about 21099.9945023690. The cubic root of 445209768 is about 763.5806155654.

The spelling of 445209768 in words is "four hundred forty-five million, two hundred nine thousand, seven hundred sixty-eight".