777028864 has 72 divisors (see below), whose sum is σ = 1649017440. Its totient is φ = 364382208.

The previous prime is 777028841. The next prime is 777028907. The reversal of 777028864 is 468820777.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 519702 + ... + 521194.

It is an arithmetic number, because the mean of its divisors is an integer number (22903020).

Almost surely, 2^777028864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 777028864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (824508720).

777028864 is an abundant number, since it is smaller than the sum of its proper divisors (871988576).

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

777028864 is a wasteful number, since it uses less digits than its factorization.

777028864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1635 (or 1621 counting only the distinct ones).

The product of its (nonzero) digits is 1053696, while the sum is 49.

The square root of 777028864 is about 27875.2374698405. The cubic root of 777028864 is about 919.3461264334.

The spelling of 777028864 in words is "seven hundred seventy-seven million, twenty-eight thousand, eight hundred sixty-four".