78790 has 8 divisors (see below), whose sum is σ = 141840. Its totient is φ = 31512.

The previous prime is 78787. The next prime is 78791. The reversal of 78790 is 9787.

78790 = 53² + 54² + ... + 72².

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78791) 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, 3930 + ... + 3949.

It is an arithmetic number, because the mean of its divisors is an integer number (17730).

2⁷⁸⁷⁹⁰ is an apocalyptic number.

78790 is a deficient number, since it is larger than the sum of its proper divisors (63050).

78790 is a wasteful number, since it uses less digits than its factorization.

78790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7886.

The product of its (nonzero) digits is 3528, while the sum is 31.

The square root of 78790 is about 280.6955646247. The cubic root of 78790 is about 42.8703504267.

It can be divided in two parts, 78 and 790, that added together give a palindrome (868).

The spelling of 78790 in words is "seventy-eight thousand, seven hundred ninety".