11997984 has 24 divisors (see below), whose sum is σ = 31494960. Its totient is φ = 3999296.

The previous prime is 11997977. The next prime is 11997991. The reversal of 11997984 is 48979911.

It is an interprime number because it is at equal distance from previous prime (11997977) and next prime (11997991).

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62394 + ... + 62585.

It is an arithmetic number, because the mean of its divisors is an integer number (1312290).

Almost surely, 2^11997984 is an apocalyptic number.

It is an amenable number.

11997984 is an abundant number, since it is smaller than the sum of its proper divisors (19496976).

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

11997984 is a wasteful number, since it uses less digits than its factorization.

11997984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124992 (or 124984 counting only the distinct ones).

The product of its digits is 163296, while the sum is 48.

The square root of 11997984 is about 3463.8106183797. The cubic root of 11997984 is about 228.9300269931.

The spelling of 11997984 in words is "eleven million, nine hundred ninety-seven thousand, nine hundred eighty-four".