11455820 has 12 divisors (see below), whose sum is σ = 24057264. Its totient is φ = 4582320.

The previous prime is 11455811. The next prime is 11455837. The reversal of 11455820 is 2855411.

It is a self number, because there is not a number n which added to its sum of digits gives 11455820.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 286376 + ... + 286415.

It is an arithmetic number, because the mean of its divisors is an integer number (2004772).

Almost surely, 2^11455820 is an apocalyptic number.

11455820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11455820 is an abundant number, since it is smaller than the sum of its proper divisors (12601444).

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

11455820 is a wasteful number, since it uses less digits than its factorization.

11455820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572800 (or 572798 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 26.

The square root of 11455820 is about 3384.6447376350. The cubic root of 11455820 is about 225.4284511036.

The spelling of 11455820 in words is "eleven million, four hundred fifty-five thousand, eight hundred twenty".