77859036 has 72 divisors (see below), whose sum is σ = 213146640. Its totient is φ = 24574752.

The previous prime is 77859013. The next prime is 77859037. The reversal of 77859036 is 63095877.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 77858982 and 77859000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77859037) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37990 + ... + 39986.

It is an arithmetic number, because the mean of its divisors is an integer number (2960370).

Almost surely, 2^77859036 is an apocalyptic number.

77859036 is a gapful number since it is divisible by the number (76) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77859036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106573320).

77859036 is an abundant number, since it is smaller than the sum of its proper divisors (135287604).

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

77859036 is a wasteful number, since it uses less digits than its factorization.

77859036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2048 (or 2021 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 45.

The square root of 77859036 is about 8823.7767424159. The cubic root of 77859036 is about 427.0083236187.

The spelling of 77859036 in words is "seventy-seven million, eight hundred fifty-nine thousand, thirty-six".