673805790 has 160 divisors (see below), whose sum is σ = 2086977024. Its totient is φ = 152798400.

The previous prime is 673805711. The next prime is 673805791. The reversal of 673805790 is 97508376.

It is a happy number.

673805790 is a `hidden beast` number, since 6 + 73 + 8 + 0 + 579 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (673805791) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 855777 + ... + 856563.

Almost surely, 2^673805790 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 673805790, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1043488512).

673805790 is an abundant number, since it is smaller than the sum of its proper divisors (1413171234).

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

673805790 is a wasteful number, since it uses less digits than its factorization.

673805790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 964 (or 955 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 45.

The square root of 673805790 is about 25957.7693571693. The cubic root of 673805790 is about 876.6876988662.

The spelling of 673805790 in words is "six hundred seventy-three million, eight hundred five thousand, seven hundred ninety".