77044086 has 96 divisors (see below), whose sum is σ = 198132480. Its totient is φ = 21183552.

The previous prime is 77044081. The next prime is 77044087. The reversal of 77044086 is 68044077.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 77044086.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77044081) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 554205 + ... + 554343.

It is an arithmetic number, because the mean of its divisors is an integer number (2063880).

Almost surely, 2^77044086 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77044086, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99066240).

77044086 is an abundant number, since it is smaller than the sum of its proper divisors (121088394).

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

77044086 is a wasteful number, since it uses less digits than its factorization.

77044086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290 (or 287 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 36.

The square root of 77044086 is about 8777.4760609187. The cubic root of 77044086 is about 425.5132640900.

Subtracting from 77044086 its reverse (68044077), we obtain a palindrome (9000009).

The spelling of 77044086 in words is "seventy-seven million, forty-four thousand, eighty-six".