11427820 has 24 divisors (see below), whose sum is σ = 24648624. Its totient is φ = 4447296.

The previous prime is 11427817. The next prime is 11427821. The reversal of 11427820 is 2872411.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (11427821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6982 + ... + 8461.

It is an arithmetic number, because the mean of its divisors is an integer number (1027026).

Almost surely, 2^11427820 is an apocalyptic number.

11427820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11427820 is an abundant number, since it is smaller than the sum of its proper divisors (13220804).

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

11427820 is a wasteful number, since it uses less digits than its factorization.

11427820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15489 (or 15487 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 11427820 is about 3380.5058793027. The cubic root of 11427820 is about 225.2446392606.

The spelling of 11427820 in words is "eleven million, four hundred twenty-seven thousand, eight hundred twenty".