78128344 has 48 divisors (see below), whose sum is σ = 171321480. Its totient is φ = 33304320.

The previous prime is 78128341. The next prime is 78128371. The reversal of 78128344 is 44382187.

It is a super-2 number, since 2×78128344² = 12208076272364672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78128341) 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, 94059 + ... + 94885.

Almost surely, 2^78128344 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 78128344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85660740).

78128344 is an abundant number, since it is smaller than the sum of its proper divisors (93193136).

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

78128344 is a wasteful number, since it uses less digits than its factorization.

78128344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1088 (or 1077 counting only the distinct ones).

The product of its digits is 43008, while the sum is 37.

The square root of 78128344 is about 8839.0239280138. The cubic root of 78128344 is about 427.5000859524.

The spelling of 78128344 in words is "seventy-eight million, one hundred twenty-eight thousand, three hundred forty-four".