77860636 has 24 divisors (see below), whose sum is σ = 156917376. Its totient is φ = 33112560.

The previous prime is 77860609. The next prime is 77860637. The reversal of 77860636 is 63606877.

It is a junction number, because it is equal to n+sod(n) for n = 77860592 and 77860601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77860637) 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 7 ways as a sum of consecutive naturals, for example, 6946 + ... + 14281.

It is an arithmetic number, because the mean of its divisors is an integer number (6538224).

Almost surely, 2^77860636 is an apocalyptic number.

It is an amenable number.

77860636 is an abundant number, since it is smaller than the sum of its proper divisors (79056740).

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

77860636 is a wasteful number, since it uses less digits than its factorization.

77860636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21369 (or 21367 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 43.

The square root of 77860636 is about 8823.8674060754. The cubic root of 77860636 is about 427.0112485999.

The spelling of 77860636 in words is "seventy-seven million, eight hundred sixty thousand, six hundred thirty-six".