78328944 has 100 divisors (see below), whose sum is σ = 238713640. Its totient is φ = 24727680.

The previous prime is 78328937. The next prime is 78328949. The reversal of 78328944 is 44982387.

It is a super-2 number, since 2×78328944² = 12270846936310272, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78328944.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78328949) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 23034 + ... + 26214.

Almost surely, 2^78328944 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 78328944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119356820).

78328944 is an abundant number, since it is smaller than the sum of its proper divisors (160384696).

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

78328944 is a wasteful number, since it uses less digits than its factorization.

78328944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3220 (or 3205 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 78328944 is about 8850.3640603085. The cubic root of 78328944 is about 427.8656520712.

The spelling of 78328944 in words is "seventy-eight million, three hundred twenty-eight thousand, nine hundred forty-four".