1163398728 has 32 divisors (see below), whose sum is σ = 3061576800. Its totient is φ = 367388928.

The previous prime is 1163398727. The next prime is 1163398751. The reversal of 1163398728 is 8278933611.

It is not an unprimeable number, because it can be changed into a prime (1163398727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1275201 + ... + 1276112.

It is an arithmetic number, because the mean of its divisors is an integer number (95674275).

Almost surely, 2^1163398728 is an apocalyptic number.

It is an amenable number.

1163398728 is an abundant number, since it is smaller than the sum of its proper divisors (1898178072).

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

1163398728 is a wasteful number, since it uses less digits than its factorization.

1163398728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2551341 (or 2551337 counting only the distinct ones).

The product of its digits is 435456, while the sum is 48.

The square root of 1163398728 is about 34108.6312830052. The cubic root of 1163398728 is about 1051.7427530052.

The spelling of 1163398728 in words is "one billion, one hundred sixty-three million, three hundred ninety-eight thousand, seven hundred twenty-eight".