78563826 has 48 divisors (see below), whose sum is σ = 187012800. Its totient is φ = 23638560.

The previous prime is 78563809. The next prime is 78563857. The reversal of 78563826 is 62836587.

78563826 is a `hidden beast` number, since 7 + 8 + 5 + 638 + 2 + 6 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28171 + ... + 30833.

It is an arithmetic number, because the mean of its divisors is an integer number (3896100).

Almost surely, 2^78563826 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78563826, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93506400).

78563826 is an abundant number, since it is smaller than the sum of its proper divisors (108448974).

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

78563826 is a wasteful number, since it uses less digits than its factorization.

78563826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2831 (or 2828 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 78563826 is about 8863.6237510400. The cubic root of 78563826 is about 428.2929000712.

The spelling of 78563826 in words is "seventy-eight million, five hundred sixty-three thousand, eight hundred twenty-six".