12904224 has 48 divisors (see below), whose sum is σ = 35870688. Its totient is φ = 4047872.

The previous prime is 12904223. The next prime is 12904237. The reversal of 12904224 is 42240921.

It is a tau number, because it is divible by the number of its divisors (48).

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

It is a junction number, because it is equal to n+sod(n) for n = 12904194 and 12904203.

It is not an unprimeable number, because it can be changed into a prime (12904223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2322 + ... + 5585.

It is an arithmetic number, because the mean of its divisors is an integer number (747306).

Almost surely, 2^12904224 is an apocalyptic number.

It is an amenable number.

12904224 is an abundant number, since it is smaller than the sum of its proper divisors (22966464).

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

12904224 is a wasteful number, since it uses less digits than its factorization.

12904224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7937 (or 7929 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 12904224 is about 3592.2449805101. The cubic root of 12904224 is about 234.5546052993.

The spelling of 12904224 in words is "twelve million, nine hundred four thousand, two hundred twenty-four".