78057693 has 24 divisors (see below), whose sum is σ = 136438848. Its totient is φ = 41980032.

The previous prime is 78057691. The next prime is 78057709. The reversal of 78057693 is 39675087.

It is a happy number.

78057693 is a `hidden beast` number, since 78 + 0 + 576 + 9 + 3 = 666.

It is not a de Polignac number, because 78057693 - 2¹ = 78057691 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78057691) by changing a digit.

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, 35371 + ... + 37512.

It is an arithmetic number, because the mean of its divisors is an integer number (5684952).

Almost surely, 2^78057693 is an apocalyptic number.

It is an amenable number.

78057693 is a deficient number, since it is larger than the sum of its proper divisors (58381155).

78057693 is a wasteful number, since it uses less digits than its factorization.

78057693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72913 (or 72910 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 45.

The square root of 78057693 is about 8835.0264855291. The cubic root of 78057693 is about 427.3711851556.

The spelling of 78057693 in words is "seventy-eight million, fifty-seven thousand, six hundred ninety-three".