11947812 has 12 divisors (see below), whose sum is σ = 27878256. Its totient is φ = 3982600.

The previous prime is 11947811. The next prime is 11947847. The reversal of 11947812 is 21874911.

11947812 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (11947811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 497814 + ... + 497837.

It is an arithmetic number, because the mean of its divisors is an integer number (2323188).

Almost surely, 2^11947812 is an apocalyptic number.

11947812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11947812 is an abundant number, since it is smaller than the sum of its proper divisors (15930444).

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

11947812 is a wasteful number, since it uses less digits than its factorization.

11947812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 995658 (or 995656 counting only the distinct ones).

The product of its digits is 4032, while the sum is 33.

The square root of 11947812 is about 3456.5607184020. The cubic root of 11947812 is about 228.6104753977.

The spelling of 11947812 in words is "eleven million, nine hundred forty-seven thousand, eight hundred twelve".