78565788 has 96 divisors (see below), whose sum is σ = 235845120. Its totient is φ = 22429872.

The previous prime is 78565777. The next prime is 78565793. The reversal of 78565788 is 88756587.

It is a happy number.

78565788 is a `hidden beast` number, since 7 + 8 + 565 + 78 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 60595 + ... + 61877.

It is an arithmetic number, because the mean of its divisors is an integer number (2456720).

Almost surely, 2^78565788 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 78565788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117922560).

78565788 is an abundant number, since it is smaller than the sum of its proper divisors (157279332).

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

78565788 is a wasteful number, since it uses less digits than its factorization.

78565788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1315 (or 1295 counting only the distinct ones).

The product of its digits is 3763200, while the sum is 54.

The square root of 78565788 is about 8863.7344274296. The cubic root of 78565788 is about 428.2964653409.

The spelling of 78565788 in words is "seventy-eight million, five hundred sixty-five thousand, seven hundred eighty-eight".