78578256 has 40 divisors (see below), whose sum is σ = 205861824. Its totient is φ = 25822720.

The previous prime is 78578251. The next prime is 78578257. The reversal of 78578256 is 65287587.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78578251) 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, 8121 + ... + 14936.

Almost surely, 2^78578256 is an apocalyptic number.

It is an amenable number.

78578256 is an abundant number, since it is smaller than the sum of its proper divisors (127283568).

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

78578256 is a wasteful number, since it uses less digits than its factorization.

78578256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23139 (or 23133 counting only the distinct ones).

The product of its digits is 940800, while the sum is 48.

The square root of 78578256 is about 8864.4377148243. The cubic root of 78578256 is about 428.3191203158.

The spelling of 78578256 in words is "seventy-eight million, five hundred seventy-eight thousand, two hundred fifty-six".