673699980 has 24 divisors (see below), whose sum is σ = 1886360112. Its totient is φ = 179653312.

The previous prime is 673699951. The next prime is 673699981. The reversal of 673699980 is 89996376.

It is a self number, because there is not a number n which added to its sum of digits gives 673699980.

It is not an unprimeable number, because it can be changed into a prime (673699981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5614107 + ... + 5614226.

It is an arithmetic number, because the mean of its divisors is an integer number (78598338).

Almost surely, 2^673699980 is an apocalyptic number.

673699980 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

673699980 is an abundant number, since it is smaller than the sum of its proper divisors (1212660132).

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

673699980 is a wasteful number, since it uses less digits than its factorization.

673699980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11228345 (or 11228343 counting only the distinct ones).

The product of its (nonzero) digits is 4408992, while the sum is 57.

The square root of 673699980 is about 25955.7311590331. The cubic root of 673699980 is about 876.6418067200.

The spelling of 673699980 in words is "six hundred seventy-three million, six hundred ninety-nine thousand, nine hundred eighty".