673644446 has 16 divisors (see below), whose sum is σ = 1043905920. Its totient is φ = 325693440.

The previous prime is 673644443. The next prime is 673644463. The reversal of 673644446 is 644446376.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 673644397 and 673644406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (673644443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88670 + ... + 95966.

It is an arithmetic number, because the mean of its divisors is an integer number (65244120).

Almost surely, 2^673644446 is an apocalyptic number.

673644446 is a deficient number, since it is larger than the sum of its proper divisors (370261474).

673644446 is a wasteful number, since it uses less digits than its factorization.

673644446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8819.

The product of its digits is 1161216, while the sum is 44.

The square root of 673644446 is about 25954.6613539842. The cubic root of 673644446 is about 876.6177184684.

The spelling of 673644446 in words is "six hundred seventy-three million, six hundred forty-four thousand, four hundred forty-six".