78015696 has 80 divisors (see below), whose sum is σ = 221652480. Its totient is φ = 23448960.

The previous prime is 78015689. The next prime is 78015697. The reversal of 78015696 is 69651087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78015697) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72861 + ... + 73923.

It is an arithmetic number, because the mean of its divisors is an integer number (2770656).

Almost surely, 2^78015696 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 78015696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110826240).

78015696 is an abundant number, since it is smaller than the sum of its proper divisors (143636784).

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

78015696 is a wasteful number, since it uses less digits than its factorization.

78015696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1224 (or 1218 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 42.

The square root of 78015696 is about 8832.6494326448. The cubic root of 78015696 is about 427.2945259274.

The spelling of 78015696 in words is "seventy-eight million, fifteen thousand, six hundred ninety-six".