11527820 has 12 divisors (see below), whose sum is σ = 24208464. Its totient is φ = 4611120.

The previous prime is 11527811. The next prime is 11527823. The reversal of 11527820 is 2872511.

It is a self number, because there is not a number n which added to its sum of digits gives 11527820.

It is not an unprimeable number, because it can be changed into a prime (11527823) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 288176 + ... + 288215.

It is an arithmetic number, because the mean of its divisors is an integer number (2017372).

Almost surely, 2^11527820 is an apocalyptic number.

11527820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11527820 is an abundant number, since it is smaller than the sum of its proper divisors (12680644).

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

11527820 is a wasteful number, since it uses less digits than its factorization.

11527820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576400 (or 576398 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 26.

The square root of 11527820 is about 3395.2643490603. The cubic root of 11527820 is about 225.8997388568.

The spelling of 11527820 in words is "eleven million, five hundred twenty-seven thousand, eight hundred twenty".