673709520 has 80 divisors (see below), whose sum is σ = 2278372032. Its totient is φ = 163322880.

The previous prime is 673709513. The next prime is 673709521. The reversal of 673709520 is 25907376.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (673709521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124957 + ... + 130236.

Almost surely, 2^673709520 is an apocalyptic number.

673709520 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

673709520 is an abundant number, since it is smaller than the sum of its proper divisors (1604662512).

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

673709520 is a wasteful number, since it uses less digits than its factorization.

673709520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255220 (or 255214 counting only the distinct ones).

The product of its (nonzero) digits is 79380, while the sum is 39.

The square root of 673709520 is about 25955.9149328241. The cubic root of 673709520 is about 876.6459446269.

The spelling of 673709520 in words is "six hundred seventy-three million, seven hundred nine thousand, five hundred twenty".