11842820 has 24 divisors (see below), whose sum is σ = 27131328. Its totient is φ = 4306400.

The previous prime is 11842813. The next prime is 11842841. The reversal of 11842820 is 2824811.

It is a self number, because there is not a number n which added to its sum of digits gives 11842820.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26696 + ... + 27135.

It is an arithmetic number, because the mean of its divisors is an integer number (1130472).

Almost surely, 2^11842820 is an apocalyptic number.

11842820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11842820 is an abundant number, since it is smaller than the sum of its proper divisors (15288508).

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

11842820 is a wasteful number, since it uses less digits than its factorization.

11842820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53851 (or 53849 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 26.

The square root of 11842820 is about 3441.3398553470. The cubic root of 11842820 is about 227.9388622368.

Subtracting from 11842820 its reverse (2824811), we obtain a square (9018009 = 3003²).

It can be divided in two parts, 1184 and 2820, that added together give a palindrome (4004).

The spelling of 11842820 in words is "eleven million, eight hundred forty-two thousand, eight hundred twenty".