797257728 has 208 divisors, whose sum is σ = 2417983200. Its totient is φ = 262766592.

The previous prime is 797257709. The next prime is 797257729. The reversal of 797257728 is 827752797.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (797257729) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8957908 + ... + 8957996.

Almost surely, 2^797257728 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 797257728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1208991600).

797257728 is an abundant number, since it is smaller than the sum of its proper divisors (1620725472).

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

797257728 is an frugal number, since it uses more digits than its factorization.

797257728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134 (or 94 counting only the distinct ones).

The product of its digits is 3457440, while the sum is 54.

The square root of 797257728 is about 28235.7526551002. The cubic root of 797257728 is about 927.2558441720.

The spelling of 797257728 in words is "seven hundred ninety-seven million, two hundred fifty-seven thousand, seven hundred twenty-eight".