11528780 has 12 divisors (see below), whose sum is σ = 24210480. Its totient is φ = 4611504.

The previous prime is 11528779. The next prime is 11528791. The reversal of 11528780 is 8782511.

It is a happy number.

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, 288200 + ... + 288239.

It is an arithmetic number, because the mean of its divisors is an integer number (2017540).

Almost surely, 2^11528780 is an apocalyptic number.

11528780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11528780 is an abundant number, since it is smaller than the sum of its proper divisors (12681700).

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

11528780 is a wasteful number, since it uses less digits than its factorization.

11528780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576448 (or 576446 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 32.

The square root of 11528780 is about 3395.4057194980. The cubic root of 11528780 is about 225.9060094188.

The spelling of 11528780 in words is "eleven million, five hundred twenty-eight thousand, seven hundred eighty".