78739752 has 128 divisors (see below), whose sum is σ = 250306560. Its totient is φ = 20079360.

The previous prime is 78739697. The next prime is 78739753. The reversal of 78739752 is 25793787.

It is not an unprimeable number, because it can be changed into a prime (78739753) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 67123 + ... + 68285.

It is an arithmetic number, because the mean of its divisors is an integer number (1955520).

Almost surely, 2^78739752 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 78739752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (125153280).

78739752 is an abundant number, since it is smaller than the sum of its proper divisors (171566808).

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

78739752 is a wasteful number, since it uses less digits than its factorization.

78739752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1223 (or 1219 counting only the distinct ones).

The product of its digits is 740880, while the sum is 48.

The square root of 78739752 is about 8873.5422464763. The cubic root of 78739752 is about 428.6123502512.

The spelling of 78739752 in words is "seventy-eight million, seven hundred thirty-nine thousand, seven hundred fifty-two".