673945442 has 12 divisors (see below), whose sum is σ = 1046982066. Its totient is φ = 325352160.

The previous prime is 673945387. The next prime is 673945451. The reversal of 673945442 is 244549376.

It can be written as a sum of positive squares in 3 ways, for example, as 605701321 + 68244121 = 24611^2 + 8261^2 .

It is a junction number, because it is equal to n+sod(n) for n = 673945393 and 673945402.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 198659 + ... + 202022.

Almost surely, 2^673945442 is an apocalyptic number.

673945442 is a deficient number, since it is larger than the sum of its proper divisors (373036624).

673945442 is a wasteful number, since it uses less digits than its factorization.

673945442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400741 (or 400712 counting only the distinct ones).

The product of its digits is 725760, while the sum is 44.

The square root of 673945442 is about 25960.4592024101. The cubic root of 673945442 is about 876.7482616846.

The spelling of 673945442 in words is "six hundred seventy-three million, nine hundred forty-five thousand, four hundred forty-two".