78911340 has 48 divisors (see below), whose sum is σ = 222385632. Its totient is φ = 20906496.

The previous prime is 78911333. The next prime is 78911377. The reversal of 78911340 is 4311987.

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, 5232 + ... + 13608.

It is an arithmetic number, because the mean of its divisors is an integer number (4633034).

Almost surely, 2^78911340 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 78911340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111192816).

78911340 is an abundant number, since it is smaller than the sum of its proper divisors (143474292).

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

78911340 is a wasteful number, since it uses less digits than its factorization.

78911340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8546 (or 8544 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 78911340 is about 8883.2055025199. The cubic root of 78911340 is about 428.9234653542.

The spelling of 78911340 in words is "seventy-eight million, nine hundred eleven thousand, three hundred forty".