78663424 has 54 divisors (see below), whose sum is σ = 182684544. Its totient is φ = 33707520.

The previous prime is 78663397. The next prime is 78663449. The reversal of 78663424 is 42436687.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9409 + ... + 15679.

Almost surely, 2^78663424 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 78663424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91342272).

78663424 is an abundant number, since it is smaller than the sum of its proper divisors (104021120).

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

78663424 is an equidigital number, since it uses as much as digits as its factorization.

78663424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6301 (or 6280 counting only the distinct ones).

The product of its digits is 193536, while the sum is 40.

The square root of 78663424 is about 8869.2403282356. The cubic root of 78663424 is about 428.4738107403.

The spelling of 78663424 in words is "seventy-eight million, six hundred sixty-three thousand, four hundred twenty-four".