12311664 has 20 divisors (see below), whose sum is σ = 31805256. Its totient is φ = 4103872.

The previous prime is 12311657. The next prime is 12311671. The reversal of 12311664 is 46611321.

It is an interprime number because it is at equal distance from previous prime (12311657) and next prime (12311671).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

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, 128199 + ... + 128294.

Almost surely, 2^12311664 is an apocalyptic number.

It is an amenable number.

12311664 is an abundant number, since it is smaller than the sum of its proper divisors (19493592).

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

12311664 is a wasteful number, since it uses less digits than its factorization.

12311664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256504 (or 256498 counting only the distinct ones).

The product of its digits is 864, while the sum is 24.

The square root of 12311664 is about 3508.7980848148. The cubic root of 12311664 is about 230.9079673111.

Adding to 12311664 its reverse (46611321), we get a palindrome (58922985).

The spelling of 12311664 in words is "twelve million, three hundred eleven thousand, six hundred sixty-four".