77826228 has 24 divisors (see below), whose sum is σ = 183637440. Its totient is φ = 25650240.

The previous prime is 77826209. The next prime is 77826233. The reversal of 77826228 is 82262877.

It is a self number, because there is not a number n which added to its sum of digits gives 77826228.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35368 + ... + 37503.

It is an arithmetic number, because the mean of its divisors is an integer number (7651560).

Almost surely, 2^77826228 is an apocalyptic number.

It is an amenable number.

77826228 is an abundant number, since it is smaller than the sum of its proper divisors (105811212).

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

77826228 is a wasteful number, since it uses less digits than its factorization.

77826228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72967 (or 72965 counting only the distinct ones).

The product of its digits is 150528, while the sum is 42.

The square root of 77826228 is about 8821.9174786437. The cubic root of 77826228 is about 426.9483380431.

The spelling of 77826228 in words is "seventy-seven million, eight hundred twenty-six thousand, two hundred twenty-eight".