772811280 has 200 divisors, whose sum is σ = 2700720000. Its totient is φ = 204809472.

The previous prime is 772811243. The next prime is 772811327. The reversal of 772811280 is 82118277.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1548471 + ... + 1548969.

It is an arithmetic number, because the mean of its divisors is an integer number (13503600).

Almost surely, 2^772811280 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 772811280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1350360000).

772811280 is an abundant number, since it is smaller than the sum of its proper divisors (1927908720).

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

772811280 is a wasteful number, since it uses less digits than its factorization.

772811280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 763 (or 748 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 36.

The square root of 772811280 is about 27799.4834484384. The cubic root of 772811280 is about 917.6797550132.

The spelling of 772811280 in words is "seven hundred seventy-two million, eight hundred eleven thousand, two hundred eighty".