78783828 has 12 divisors (see below), whose sum is σ = 183828960. Its totient is φ = 26261272.

The previous prime is 78783799. The next prime is 78783829. The reversal of 78783828 is 82838787.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78783829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3282648 + ... + 3282671.

It is an arithmetic number, because the mean of its divisors is an integer number (15319080).

Almost surely, 2^78783828 is an apocalyptic number.

It is an amenable number.

78783828 is an abundant number, since it is smaller than the sum of its proper divisors (105045132).

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

78783828 is a wasteful number, since it uses less digits than its factorization.

78783828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6565326 (or 6565324 counting only the distinct ones).

The product of its digits is 1204224, while the sum is 51.

The square root of 78783828 is about 8876.0254618833. The cubic root of 78783828 is about 428.6923098380.

The spelling of 78783828 in words is "seventy-eight million, seven hundred eighty-three thousand, eight hundred twenty-eight".