1165386728 has 16 divisors (see below), whose sum is σ = 2383745760. Its totient is φ = 529721200.

The previous prime is 1165386707. The next prime is 1165386763. The reversal of 1165386728 is 8276835611.

It is a super-4 number, since 4×1165386728⁴ (a number of 37 digits) contains 4444 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6621428 + ... + 6621603.

It is an arithmetic number, because the mean of its divisors is an integer number (148984110).

Almost surely, 2^1165386728 is an apocalyptic number.

It is an amenable number.

1165386728 is an abundant number, since it is smaller than the sum of its proper divisors (1218359032).

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

1165386728 is a wasteful number, since it uses less digits than its factorization.

1165386728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13243048 (or 13243044 counting only the distinct ones).

The product of its digits is 483840, while the sum is 47.

The square root of 1165386728 is about 34137.7610279292. The cubic root of 1165386728 is about 1052.3414800294.

The spelling of 1165386728 in words is "one billion, one hundred sixty-five million, three hundred eighty-six thousand, seven hundred twenty-eight".