445239081 has 24 divisors (see below), whose sum is σ = 758710784. Its totient is φ = 246214080.

The previous prime is 445239077. The next prime is 445239121. The reversal of 445239081 is 180932544.

445239081 is a `hidden beast` number, since 44 + 523 + 90 + 8 + 1 = 666.

It is not a de Polignac number, because 445239081 - 2² = 445239077 is a prime.

It is a super-2 number, since 2×445239081² = 396475678499449122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (445239281) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 112036 + ... + 115941.

Almost surely, 2^445239081 is an apocalyptic number.

It is an amenable number.

445239081 is a deficient number, since it is larger than the sum of its proper divisors (313471703).

445239081 is a wasteful number, since it uses less digits than its factorization.

445239081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228021 (or 228018 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 445239081 is about 21100.6891119698. The cubic root of 445239081 is about 763.5973734692.

The spelling of 445239081 in words is "four hundred forty-five million, two hundred thirty-nine thousand, eighty-one".