442031004 has 36 divisors (see below), whose sum is σ = 1144612560. Its totient is φ = 143749440.

The previous prime is 442030973. The next prime is 442031011. The reversal of 442031004 is 400130244.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 148264 + ... + 151215.

Almost surely, 2^442031004 is an apocalyptic number.

It is an amenable number.

442031004 is an abundant number, since it is smaller than the sum of its proper divisors (702581556).

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

442031004 is a wasteful number, since it uses less digits than its factorization.

442031004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299530 (or 299525 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 442031004 is about 21024.5333836449. The cubic root of 442031004 is about 761.7589706191.

Adding to 442031004 its reverse (400130244), we get a palindrome (842161248).

The spelling of 442031004 in words is "four hundred forty-two million, thirty-one thousand, four".