673939728 has 360 divisors, whose sum is σ = 2524972320. Its totient is φ = 165473280.

The previous prime is 673939711. The next prime is 673939733. The reversal of 673939728 is 827939376.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1474476 + ... + 1474932.

It is an arithmetic number, because the mean of its divisors is an integer number (7013812).

Almost surely, 2^673939728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 673939728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1262486160).

673939728 is an abundant number, since it is smaller than the sum of its proper divisors (1851032592).

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

673939728 is a wasteful number, since it uses less digits than its factorization.

673939728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515 (or 499 counting only the distinct ones).

The product of its digits is 3429216, while the sum is 54.

The square root of 673939728 is about 25960.3491501944. The cubic root of 673939728 is about 876.7457838611.

The spelling of 673939728 in words is "six hundred seventy-three million, nine hundred thirty-nine thousand, seven hundred twenty-eight".