7731225828 has 36 divisors (see below), whose sum is σ = 19557303948. Its totient is φ = 2575165440.

The previous prime is 7731225791. The next prime is 7731225839. The reversal of 7731225828 is 8285221377.

It can be written as a sum of positive squares in 2 ways, for example, as 2502200484 + 5229025344 = 50022^2 + 72312^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29901 + ... + 127892.

It is an arithmetic number, because the mean of its divisors is an integer number (543258443).

Almost surely, 2^7731225828 is an apocalyptic number.

It is an amenable number.

7731225828 is an abundant number, since it is smaller than the sum of its proper divisors (11826078120).

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

7731225828 is a wasteful number, since it uses less digits than its factorization.

7731225828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159164 (or 159159 counting only the distinct ones).

The product of its digits is 376320, while the sum is 45.

The square root of 7731225828 is about 87927.3895211270. The cubic root of 7731225828 is about 1977.3465312859.

The spelling of 7731225828 in words is "seven billion, seven hundred thirty-one million, two hundred twenty-five thousand, eight hundred twenty-eight".