673787840 has 112 divisors (see below), whose sum is σ = 1773204480. Its totient is φ = 241812480.

The previous prime is 673787839. The next prime is 673787893. The reversal of 673787840 is 48787376.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 276869 + ... + 279291.

Almost surely, 2^673787840 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 673787840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (886602240).

673787840 is an abundant number, since it is smaller than the sum of its proper divisors (1099416640).

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

673787840 is a wasteful number, since it uses less digits than its factorization.

673787840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2530 (or 2520 counting only the distinct ones).

The product of its (nonzero) digits is 1580544, while the sum is 50.

The square root of 673787840 is about 25957.4236009663. The cubic root of 673787840 is about 876.6799138911.

The spelling of 673787840 in words is "six hundred seventy-three million, seven hundred eighty-seven thousand, eight hundred forty".