78418799 has 16 divisors (see below), whose sum is σ = 86034432. Its totient is φ = 71251488.

The previous prime is 78418759. The next prime is 78418801. The reversal of 78418799 is 99781487.

It is a cyclic number.

It is not a de Polignac number, because 78418799 - 2¹⁶ = 78353263 is a prime.

It is a super-2 number, since 2×78418799² = 12299016073204802, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78418799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78418759) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35522 + ... + 37664.

It is an arithmetic number, because the mean of its divisors is an integer number (5377152).

Almost surely, 2^78418799 is an apocalyptic number.

78418799 is a deficient number, since it is larger than the sum of its proper divisors (7615633).

78418799 is a wasteful number, since it uses less digits than its factorization.

78418799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2246.

The product of its digits is 1016064, while the sum is 53.

The square root of 78418799 is about 8855.4389501594. The cubic root of 78418799 is about 428.0291981565.

The spelling of 78418799 in words is "seventy-eight million, four hundred eighteen thousand, seven hundred ninety-nine".