12516444 has 72 divisors (see below), whose sum is σ = 33429760. Its totient is φ = 4094064.

The previous prime is 12516431. The next prime is 12516461. The reversal of 12516444 is 44461521.

12516444 is a `hidden beast` number, since 12 + 5 + 1 + 644 + 4 = 666.

It is a super-2 number, since 2×12516444² = 313322740810272, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 76707 + ... + 76869.

Almost surely, 2^12516444 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12516444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16714880).

12516444 is an abundant number, since it is smaller than the sum of its proper divisors (20913316).

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

12516444 is a wasteful number, since it uses less digits than its factorization.

12516444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261 (or 247 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 12516444 is about 3537.8586743961. The cubic root of 12516444 is about 232.1811654695.

Adding to 12516444 its reverse (44461521), we get a palindrome (56977965).

The spelling of 12516444 in words is "twelve million, five hundred sixteen thousand, four hundred forty-four".