78879744 has 132 divisors (see below), whose sum is σ = 236944344. Its totient is φ = 26210304.

The previous prime is 78879743. The next prime is 78879781. The reversal of 78879744 is 44797887.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78879743) 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, 248674 + ... + 248990.

Almost surely, 2^78879744 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 78879744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118472172).

78879744 is an abundant number, since it is smaller than the sum of its proper divisors (158064600).

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

78879744 is an equidigital number, since it uses as much as digits as its factorization.

78879744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352 (or 322 counting only the distinct ones).

The product of its digits is 3161088, while the sum is 54.

The square root of 78879744 is about 8881.4269123829. The cubic root of 78879744 is about 428.8662109090.

The spelling of 78879744 in words is "seventy-eight million, eight hundred seventy-nine thousand, seven hundred forty-four".