442921236 has 48 divisors (see below), whose sum is σ = 1089446400. Its totient is φ = 139668192.

The previous prime is 442921231. The next prime is 442921243. The reversal of 442921236 is 632129244.

It is a junction number, because it is equal to n+sod(n) for n = 442921197 and 442921206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442921231) 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 15 ways as a sum of consecutive naturals, for example, 286281 + ... + 287823.

It is an arithmetic number, because the mean of its divisors is an integer number (22696800).

Almost surely, 2^442921236 is an apocalyptic number.

It is an amenable number.

442921236 is an abundant number, since it is smaller than the sum of its proper divisors (646525164).

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

442921236 is a wasteful number, since it uses less digits than its factorization.

442921236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2828 (or 2826 counting only the distinct ones).

The product of its digits is 20736, while the sum is 33.

The square root of 442921236 is about 21045.6940013866. The cubic root of 442921236 is about 762.2700112961.

The spelling of 442921236 in words is "four hundred forty-two million, nine hundred twenty-one thousand, two hundred thirty-six".