78618078 has 96 divisors (see below), whose sum is σ = 214486272. Its totient is φ = 20217600.

The previous prime is 78618073. The next prime is 78618079. The reversal of 78618078 is 87081687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78618073) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 181350 + ... + 181782.

It is an arithmetic number, because the mean of its divisors is an integer number (2234232).

Almost surely, 2^78618078 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78618078, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107243136).

78618078 is an abundant number, since it is smaller than the sum of its proper divisors (135868194).

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

78618078 is a wasteful number, since it uses less digits than its factorization.

78618078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 590 (or 587 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 45.

The square root of 78618078 is about 8866.6835964751. The cubic root of 78618078 is about 428.3914628203.

The spelling of 78618078 in words is "seventy-eight million, six hundred eighteen thousand, seventy-eight".