78619944 has 64 divisors (see below), whose sum is σ = 214885440. Its totient is φ = 23823360.

The previous prime is 78619939. The next prime is 78619969. The reversal of 78619944 is 44991687.

It is a junction number, because it is equal to n+sod(n) for n = 78619893 and 78619902.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19024 + ... + 22784.

It is an arithmetic number, because the mean of its divisors is an integer number (3357585).

Almost surely, 2^78619944 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 78619944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107442720).

78619944 is an abundant number, since it is smaller than the sum of its proper divisors (136265496).

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

78619944 is a wasteful number, since it uses less digits than its factorization.

78619944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3850 (or 3846 counting only the distinct ones).

The product of its digits is 435456, while the sum is 48.

The square root of 78619944 is about 8866.7888212137. The cubic root of 78619944 is about 428.3948520838.

The spelling of 78619944 in words is "seventy-eight million, six hundred nineteen thousand, nine hundred forty-four".