445908918 has 80 divisors (see below), whose sum is σ = 1120892976. Its totient is φ = 117552960.

The previous prime is 445908917. The next prime is 445908973. The reversal of 445908918 is 819809544.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445908913) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 186088 + ... + 188468.

Almost surely, 2^445908918 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 445908918, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (560446488).

445908918 is an abundant number, since it is smaller than the sum of its proper divisors (674984058).

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

445908918 is a wasteful number, since it uses less digits than its factorization.

445908918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2427 (or 2406 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 48.

The square root of 445908918 is about 21116.5555429857. Note that the first 4 decimals coincide. The cubic root of 445908918 is about 763.9801112756.

The spelling of 445908918 in words is "four hundred forty-five million, nine hundred eight thousand, nine hundred eighteen".