673139280 has 80 divisors (see below), whose sum is σ = 2276443584. Its totient is φ = 163184640.

The previous prime is 673139279. The next prime is 673139281. The reversal of 673139280 is 82931376.

It is an interprime number because it is at equal distance from previous prime (673139279) and next prime (673139281).

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 (673139281) 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, 124849 + ... + 130128.

Almost surely, 2^673139280 is an apocalyptic number.

673139280 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

673139280 is an abundant number, since it is smaller than the sum of its proper divisors (1603304304).

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

673139280 is a wasteful number, since it uses less digits than its factorization.

673139280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255004 (or 254998 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 673139280 is about 25944.9278279975. The cubic root of 673139280 is about 876.3985384496.

The spelling of 673139280 in words is "six hundred seventy-three million, one hundred thirty-nine thousand, two hundred eighty".