790642 has 4 divisors (see below), whose sum is σ = 1185966. Its totient is φ = 395320.

The previous prime is 790637. The next prime is 790649. The reversal of 790642 is 246097.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 654481 + 136161 = 809^2 + 369^2 .

It is a super-2 number, since 2×790642² = 1250229544328, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 790642.

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

790642 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197659 + ... + 197662.

2⁷⁹⁰⁶⁴² is an apocalyptic number.

790642 is a deficient number, since it is larger than the sum of its proper divisors (395324).

790642 is a wasteful number, since it uses less digits than its factorization.

790642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395323.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 790642 is about 889.1805216040. The cubic root of 790642 is about 92.4683894910.

The spelling of 790642 in words is "seven hundred ninety thousand, six hundred forty-two".