78694512 has 120 divisors (see below), whose sum is σ = 224650800. Its totient is φ = 23721984.

The previous prime is 78694501. The next prime is 78694519. The reversal of 78694512 is 21549687.

Its product of digits (120960) is a multiple of the sum of its prime divisors (216).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78694519) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 721914 + ... + 722022.

It is an arithmetic number, because the mean of its divisors is an integer number (1872090).

Almost surely, 2^78694512 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 78694512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112325400).

78694512 is an abundant number, since it is smaller than the sum of its proper divisors (145956288).

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

78694512 is a wasteful number, since it uses less digits than its factorization.

78694512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235 (or 216 counting only the distinct ones).

The product of its digits is 120960, while the sum is 42.

The square root of 78694512 is about 8870.9927291144. The cubic root of 78694512 is about 428.5302479797.

The spelling of 78694512 in words is "seventy-eight million, six hundred ninety-four thousand, five hundred twelve".