442991742 has 16 divisors (see below), whose sum is σ = 890576400. Its totient is φ = 146898432.

The previous prime is 442991737. The next prime is 442991819. The reversal of 442991742 is 247199244.

It is a junction number, because it is equal to n+sod(n) for n = 442991694 and 442991703.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 190117 + ... + 192432.

It is an arithmetic number, because the mean of its divisors is an integer number (55661025).

Almost surely, 2^442991742 is an apocalyptic number.

442991742 is an abundant number, since it is smaller than the sum of its proper divisors (447584658).

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

442991742 is a wasteful number, since it uses less digits than its factorization.

442991742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382747.

The product of its digits is 145152, while the sum is 42.

The square root of 442991742 is about 21047.3690042247. The cubic root of 442991742 is about 762.3104562281.

The spelling of 442991742 in words is "four hundred forty-two million, nine hundred ninety-one thousand, seven hundred forty-two".