445422978 has 192 divisors, whose sum is σ = 1320883200. Its totient is φ = 104734080.

The previous prime is 445422961. The next prime is 445422979. The reversal of 445422978 is 879224544.

It is not an unprimeable number, because it can be changed into a prime (445422979) 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 95 ways as a sum of consecutive naturals, for example, 1062853 + ... + 1063271.

It is an arithmetic number, because the mean of its divisors is an integer number (6879600).

Almost surely, 2^445422978 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 445422978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (660441600).

445422978 is an abundant number, since it is smaller than the sum of its proper divisors (875460222).

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

445422978 is a wasteful number, since it uses less digits than its factorization.

445422978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517 (or 514 counting only the distinct ones).

The product of its digits is 645120, while the sum is 45.

The square root of 445422978 is about 21105.0462686060. The cubic root of 445422978 is about 763.7024884839.

The spelling of 445422978 in words is "four hundred forty-five million, four hundred twenty-two thousand, nine hundred seventy-eight".