673687578 has 16 divisors (see below), whose sum is σ = 1351711296. Its totient is φ = 223839840.

The previous prime is 673687571. The next prime is 673687591. The reversal of 673687578 is 875786376.

It is not an unprimeable number, because it can be changed into a prime (673687571) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 178651 + ... + 182382.

It is an arithmetic number, because the mean of its divisors is an integer number (84481956).

Almost surely, 2^673687578 is an apocalyptic number.

673687578 is an abundant number, since it is smaller than the sum of its proper divisors (678023718).

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

673687578 is a wasteful number, since it uses less digits than its factorization.

673687578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361349.

The product of its digits is 11854080, while the sum is 57.

The square root of 673687578 is about 25955.4922511595. The cubic root of 673687578 is about 876.6364273827.

The spelling of 673687578 in words is "six hundred seventy-three million, six hundred eighty-seven thousand, five hundred seventy-eight".