77828646 has 16 divisors (see below), whose sum is σ = 177894144. Its totient is φ = 22236744.

The previous prime is 77828633. The next prime is 77828671. The reversal of 77828646 is 64682877.

It is a junction number, because it is equal to n+sod(n) for n = 77828595 and 77828604.

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, 926490 + ... + 926573.

It is an arithmetic number, because the mean of its divisors is an integer number (11118384).

Almost surely, 2^77828646 is an apocalyptic number.

77828646 is an abundant number, since it is smaller than the sum of its proper divisors (100065498).

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

77828646 is a wasteful number, since it uses less digits than its factorization.

77828646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1853075.

The product of its digits is 903168, while the sum is 48.

The square root of 77828646 is about 8822.0545226155. The cubic root of 77828646 is about 426.9527596476.

The spelling of 77828646 in words is "seventy-seven million, eight hundred twenty-eight thousand, six hundred forty-six".