78790824 has 144 divisors (see below), whose sum is σ = 259290720. Its totient is φ = 21510720.

The previous prime is 78790819. The next prime is 78790837. The reversal of 78790824 is 42809787.

It is a self number, because there is not a number n which added to its sum of digits gives 78790824.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 80659 + ... + 81629.

It is an arithmetic number, because the mean of its divisors is an integer number (1800630).

Almost surely, 2^78790824 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78790824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129645360).

78790824 is an abundant number, since it is smaller than the sum of its proper divisors (180499896).

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

78790824 is a wasteful number, since it uses less digits than its factorization.

78790824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1020 (or 1006 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The square root of 78790824 is about 8876.4195484441. The cubic root of 78790824 is about 428.7049987476.

The spelling of 78790824 in words is "seventy-eight million, seven hundred ninety thousand, eight hundred twenty-four".