78785694 has 48 divisors (see below), whose sum is σ = 189780864. Its totient is φ = 23457600.

The previous prime is 78785683. The next prime is 78785711. The reversal of 78785694 is 49658787.

78785694 is a `hidden beast` number, since 7 + 8 + 78 + 569 + 4 = 666.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 78785694.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 1824 + ... + 12684.

It is an arithmetic number, because the mean of its divisors is an integer number (3953768).

Almost surely, 2^78785694 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78785694, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94890432).

78785694 is an abundant number, since it is smaller than the sum of its proper divisors (110995170).

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

78785694 is a wasteful number, since it uses less digits than its factorization.

78785694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10913 (or 10910 counting only the distinct ones).

The product of its digits is 3386880, while the sum is 54.

The square root of 78785694 is about 8876.1305758760. The cubic root of 78785694 is about 428.6956943462.

The spelling of 78785694 in words is "seventy-eight million, seven hundred eighty-five thousand, six hundred ninety-four".