11528865 has 64 divisors (see below), whose sum is σ = 22118400. Its totient is φ = 5683392.

The previous prime is 11528861. The next prime is 11528879. The reversal of 11528865 is 56882511.

It is not a de Polignac number, because 11528865 - 2² = 11528861 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11528861) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 145896 + ... + 145974.

It is an arithmetic number, because the mean of its divisors is an integer number (345600).

Almost surely, 2^11528865 is an apocalyptic number.

11528865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11528865 is a deficient number, since it is larger than the sum of its proper divisors (10589535).

11528865 is a wasteful number, since it uses less digits than its factorization.

11528865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163 (or 157 counting only the distinct ones).

The product of its digits is 19200, while the sum is 36.

The square root of 11528865 is about 3395.4182363886. The cubic root of 11528865 is about 225.9065646080.

The spelling of 11528865 in words is "eleven million, five hundred twenty-eight thousand, eight hundred sixty-five".