78691652 has 24 divisors (see below), whose sum is σ = 149700096. Its totient is φ = 35977248.

The previous prime is 78691651. The next prime is 78691661. The reversal of 78691652 is 25619687.

It is not an unprimeable number, because it can be changed into a prime (78691651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1508 + ... + 12635.

It is an arithmetic number, because the mean of its divisors is an integer number (6237504).

Almost surely, 2^78691652 is an apocalyptic number.

It is an amenable number.

78691652 is a deficient number, since it is larger than the sum of its proper divisors (71008444).

78691652 is a wasteful number, since it uses less digits than its factorization.

78691652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14267 (or 14265 counting only the distinct ones).

The product of its digits is 181440, while the sum is 44.

The square root of 78691652 is about 8870.8315281038. The cubic root of 78691652 is about 428.5250565488.

The spelling of 78691652 in words is "seventy-eight million, six hundred ninety-one thousand, six hundred fifty-two".