771228396 has 36 divisors (see below), whose sum is σ = 1954297800. Its totient is φ = 256442688.

The previous prime is 771228391. The next prime is 771228397. The reversal of 771228396 is 693822177.

771228396 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (771228391) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11466 + ... + 40913.

It is an arithmetic number, because the mean of its divisors is an integer number (54286050).

Almost surely, 2^771228396 is an apocalyptic number.

It is an amenable number.

771228396 is an abundant number, since it is smaller than the sum of its proper divisors (1183069404).

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

771228396 is a wasteful number, since it uses less digits than its factorization.

771228396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52798 (or 52793 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 771228396 is about 27770.9991898023. Note that the first 3 decimals coincide. The cubic root of 771228396 is about 917.0527914834.

Adding to 771228396 its sum of digits (45), we get a square (771228441 = 27771²).

The spelling of 771228396 in words is "seven hundred seventy-one million, two hundred twenty-eight thousand, three hundred ninety-six".