442844136 has 48 divisors (see below), whose sum is σ = 1370709600. Its totient is φ = 126526752.

The previous prime is 442844119. The next prime is 442844137. The reversal of 442844136 is 631448244.

442844136 is a `hidden beast` number, since 442 + 84 + 4 + 136 = 666.

It is a super-2 number, since 2×442844136² = 392221857579172992, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 442844136.

It is not an unprimeable number, because it can be changed into a prime (442844137) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 438826 + ... + 439833.

It is an arithmetic number, because the mean of its divisors is an integer number (28556450).

Almost surely, 2^442844136 is an apocalyptic number.

It is an amenable number.

442844136 is an abundant number, since it is smaller than the sum of its proper divisors (927865464).

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

442844136 is a wasteful number, since it uses less digits than its factorization.

442844136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 878678 (or 878671 counting only the distinct ones).

The product of its digits is 73728, while the sum is 36.

The square root of 442844136 is about 21043.8621930481. The cubic root of 442844136 is about 762.2257788806.

The spelling of 442844136 in words is "four hundred forty-two million, eight hundred forty-four thousand, one hundred thirty-six".