12649616 has 40 divisors (see below), whose sum is σ = 28551744. Its totient is φ = 5316480.

The previous prime is 12649613. The next prime is 12649619. The reversal of 12649616 is 61694621.

It is an interprime number because it is at equal distance from previous prime (12649613) and next prime (12649619).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12649613) 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, 4871 + ... + 7001.

Almost surely, 2^12649616 is an apocalyptic number.

12649616 is a gapful number since it is divisible by the number (16) 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 12649616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14275872).

12649616 is an abundant number, since it is smaller than the sum of its proper divisors (15902128).

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

12649616 is a wasteful number, since it uses less digits than its factorization.

12649616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2199 (or 2193 counting only the distinct ones).

The product of its digits is 15552, while the sum is 35.

The square root of 12649616 is about 3556.6298654766. The cubic root of 12649616 is about 233.0017130416.

The spelling of 12649616 in words is "twelve million, six hundred forty-nine thousand, six hundred sixteen".