442397256 has 128 divisors (see below), whose sum is σ = 1347010560. Its totient is φ = 118195200.

The previous prime is 442397243. The next prime is 442397299. The reversal of 442397256 is 652793244.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 545091 + ... + 545901.

It is an arithmetic number, because the mean of its divisors is an integer number (10523520).

Almost surely, 2^442397256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 442397256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (673505280).

442397256 is an abundant number, since it is smaller than the sum of its proper divisors (904613304).

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

442397256 is a wasteful number, since it uses less digits than its factorization.

442397256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1035 (or 1031 counting only the distinct ones).

The product of its digits is 362880, while the sum is 42.

The square root of 442397256 is about 21033.2416902388. The cubic root of 442397256 is about 761.9693018130.

The spelling of 442397256 in words is "four hundred forty-two million, three hundred ninety-seven thousand, two hundred fifty-six".