790640 has 20 divisors (see below), whose sum is σ = 1838424. Its totient is φ = 316224.

The previous prime is 790637. The next prime is 790649. The reversal of 790640 is 46097.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×790640² = 1250223219200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (790649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4862 + ... + 5021.

2⁷⁹⁰⁶⁴⁰ is an apocalyptic number.

It is an amenable number.

790640 is an abundant number, since it is smaller than the sum of its proper divisors (1047784).

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

790640 is a wasteful number, since it uses less digits than its factorization.

790640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9896 (or 9890 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 790640 is about 889.1793969723. The cubic root of 790640 is about 92.4683115219.

The spelling of 790640 in words is "seven hundred ninety thousand, six hundred forty".