77826768 has 20 divisors (see below), whose sum is σ = 201052608. Its totient is φ = 25942240.

The previous prime is 77826767. The next prime is 77826769. The reversal of 77826768 is 86762877.

It is an interprime number because it is at equal distance from previous prime (77826767) and next prime (77826769).

It is a self number, because there is not a number n which added to its sum of digits gives 77826768.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77826761) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 810648 + ... + 810743.

Almost surely, 2^77826768 is an apocalyptic number.

It is an amenable number.

77826768 is an abundant number, since it is smaller than the sum of its proper divisors (123225840).

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

77826768 is a wasteful number, since it uses less digits than its factorization.

77826768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1621402 (or 1621396 counting only the distinct ones).

The product of its digits is 1580544, while the sum is 51.

The square root of 77826768 is about 8821.9480841819. The cubic root of 77826768 is about 426.9493255062.

The spelling of 77826768 in words is "seventy-seven million, eight hundred twenty-six thousand, seven hundred sixty-eight".