673776640 has 88 divisors (see below), whose sum is σ = 1711570392. Its totient is φ = 253624320.

The previous prime is 673776629. The next prime is 673776667. The reversal of 673776640 is 46677376.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 63489024 + 610287616 = 7968^2 + 24704^2 .

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, 83170 + ... + 90910.

Almost surely, 2^673776640 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 673776640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (855785196).

673776640 is an abundant number, since it is smaller than the sum of its proper divisors (1037793752).

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

673776640 is a wasteful number, since it uses less digits than its factorization.

673776640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7783 (or 7765 counting only the distinct ones).

The product of its (nonzero) digits is 889056, while the sum is 46.

The square root of 673776640 is about 25957.2078621719. The cubic root of 673776640 is about 876.6750563435.

The spelling of 673776640 in words is "six hundred seventy-three million, seven hundred seventy-six thousand, six hundred forty".