11954820 has 24 divisors (see below), whose sum is σ = 33473664. Its totient is φ = 3187936.

The previous prime is 11954783. The next prime is 11954827. The reversal of 11954820 is 2845911.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (11954827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99564 + ... + 99683.

It is an arithmetic number, because the mean of its divisors is an integer number (1394736).

Almost surely, 2^11954820 is an apocalyptic number.

11954820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11954820 is an abundant number, since it is smaller than the sum of its proper divisors (21518844).

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

11954820 is a wasteful number, since it uses less digits than its factorization.

11954820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199259 (or 199257 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 11954820 is about 3457.5742942126. The cubic root of 11954820 is about 228.6551638889.

The spelling of 11954820 in words is "eleven million, nine hundred fifty-four thousand, eight hundred twenty".