78256576 has 42 divisors (see below), whose sum is σ = 165001448. Its totient is φ = 36817920.

The previous prime is 78256571. The next prime is 78256589. The reversal of 78256576 is 67565287.

It is a super-2 number, since 2×78256576² = 12248183374487552, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78256571) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16381 + ... + 20611.

Almost surely, 2^78256576 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 78256576, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82500724).

78256576 is an abundant number, since it is smaller than the sum of its proper divisors (86744872).

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

78256576 is a wasteful number, since it uses less digits than its factorization.

78256576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4277 (or 4250 counting only the distinct ones).

The product of its digits is 705600, while the sum is 46.

The square root of 78256576 is about 8846.2746961645. The cubic root of 78256576 is about 427.7338433144.

The spelling of 78256576 in words is "seventy-eight million, two hundred fifty-six thousand, five hundred seventy-six".