445465881 has 24 divisors (see below), whose sum is σ = 736037120. Its totient is φ = 254321856.

The previous prime is 445465847. The next prime is 445465919. The reversal of 445465881 is 188564544.

It is a happy number.

It is not a de Polignac number, because 445465881 - 2¹⁰ = 445464857 is a prime.

It is a super-2 number, since 2×445465881² = 396879702270212322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (445460881) 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 23 ways as a sum of consecutive naturals, for example, 87165 + ... + 92133.

Almost surely, 2^445465881 is an apocalyptic number.

It is an amenable number.

445465881 is a deficient number, since it is larger than the sum of its proper divisors (290571239).

445465881 is a wasteful number, since it uses less digits than its factorization.

445465881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6405 (or 6402 counting only the distinct ones).

The product of its digits is 614400, while the sum is 45.

The square root of 445465881 is about 21106.0626598141. The cubic root of 445465881 is about 763.7270075572.

The spelling of 445465881 in words is "four hundred forty-five million, four hundred sixty-five thousand, eight hundred eighty-one".