11859820 has 24 divisors (see below), whose sum is σ = 28463904. Its totient is φ = 4066176.

The previous prime is 11859817. The next prime is 11859821. The reversal of 11859820 is 2895811.

It is not an unprimeable number, because it can be changed into a prime (11859821) 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, 42217 + ... + 42496.

It is an arithmetic number, because the mean of its divisors is an integer number (1185996).

Almost surely, 2^11859820 is an apocalyptic number.

11859820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11859820 is an abundant number, since it is smaller than the sum of its proper divisors (16604084).

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

11859820 is a wasteful number, since it uses less digits than its factorization.

11859820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84729 (or 84727 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 34.

The square root of 11859820 is about 3443.8089377897. The cubic root of 11859820 is about 228.0478764752.

The spelling of 11859820 in words is "eleven million, eight hundred fifty-nine thousand, eight hundred twenty".