12217392 has 100 divisors (see below), whose sum is σ = 38620296. Its totient is φ = 3697920.

The previous prime is 12217391. The next prime is 12217397. The reversal of 12217392 is 29371221.

It is a super-4 number, since 4×12217392⁴ (a number of 29 digits) contains 4444 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (12217391) 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 19 ways as a sum of consecutive naturals, for example, 13828 + ... + 14684.

Almost surely, 2^12217392 is an apocalyptic number.

12217392 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12217392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19310148).

12217392 is an abundant number, since it is smaller than the sum of its proper divisors (26402904).

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

12217392 is a wasteful number, since it uses less digits than its factorization.

12217392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 888 (or 873 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 12217392 is about 3495.3386102065. The cubic root of 12217392 is about 230.3170925659.

It can be divided in two parts, 122173 and 92, that added together give a triangular number (122265 = T₄₉₄).

The spelling of 12217392 in words is "twelve million, two hundred seventeen thousand, three hundred ninety-two".