78825790 has 16 divisors (see below), whose sum is σ = 142375968. Its totient is φ = 31421536.

The previous prime is 78825781. The next prime is 78825809. The reversal of 78825790 is 9752887.

It is a self number, because there is not a number n which added to its sum of digits gives 78825790.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10522 + ... + 16381.

It is an arithmetic number, because the mean of its divisors is an integer number (8898498).

Almost surely, 2^78825790 is an apocalyptic number.

78825790 is a deficient number, since it is larger than the sum of its proper divisors (63550178).

78825790 is a wasteful number, since it uses less digits than its factorization.

78825790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27203.

The product of its (nonzero) digits is 282240, while the sum is 46.

The square root of 78825790 is about 8878.3889304310. The cubic root of 78825790 is about 428.7684066477.

The spelling of 78825790 in words is "seventy-eight million, eight hundred twenty-five thousand, seven hundred ninety".