1155295728 has 60 divisors (see below), whose sum is σ = 3261882000. Its totient is φ = 381685248.

The previous prime is 1155295723. The next prime is 1155295751. The reversal of 1155295728 is 8275925511.

1155295728 is a `hidden beast` number, since 1 + 1 + 55 + 29 + 572 + 8 = 666.

It is a super-3 number, since 3×1155295728³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155295721) 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, 19228 + ... + 51771.

It is an arithmetic number, because the mean of its divisors is an integer number (54364700).

Almost surely, 2^1155295728 is an apocalyptic number.

1155295728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1155295728 is an abundant number, since it is smaller than the sum of its proper divisors (2106586272).

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

1155295728 is a wasteful number, since it uses less digits than its factorization.

1155295728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71126 (or 71117 counting only the distinct ones).

The product of its digits is 252000, while the sum is 45.

The square root of 1155295728 is about 33989.6414808983. The cubic root of 1155295728 is about 1049.2952876791.

The spelling of 1155295728 in words is "one billion, one hundred fifty-five million, two hundred ninety-five thousand, seven hundred twenty-eight".