78394368 has 132 divisors (see below), whose sum is σ = 227757408. Its totient is φ = 23961600.

The previous prime is 78394343. The next prime is 78394369. The reversal of 78394368 is 86349387.

It is a super-2 number, since 2×78394368² = 12291353868238848, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78394369) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 519093 + ... + 519243.

Almost surely, 2^78394368 is an apocalyptic number.

78394368 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78394368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113878704).

78394368 is an abundant number, since it is smaller than the sum of its proper divisors (149363040).

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

78394368 is a wasteful number, since it uses less digits than its factorization.

78394368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200 (or 169 counting only the distinct ones).

The product of its digits is 870912, while the sum is 48.

The square root of 78394368 is about 8854.0594079778. The cubic root of 78394368 is about 427.9847433930.

The spelling of 78394368 in words is "seventy-eight million, three hundred ninety-four thousand, three hundred sixty-eight".