12699648 has 144 divisors (see below), whose sum is σ = 40245660. Its totient is φ = 3833856.

The previous prime is 12699641. The next prime is 12699667. The reversal of 12699648 is 84699621.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12616704 + 82944 = 3552^2 + 288^2 .

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×12699648² = 322562118647808, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (12699641) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 239590 + ... + 239642.

Almost surely, 2^12699648 is an apocalyptic number.

12699648 is a gapful number since it is divisible by the number (18) 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 12699648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20122830).

12699648 is an abundant number, since it is smaller than the sum of its proper divisors (27546012).

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

12699648 is a wasteful number, since it uses less digits than its factorization.

12699648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94 (or 71 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 12699648 is about 3563.6565491080. The cubic root of 12699648 is about 233.3084998514.

The spelling of 12699648 in words is "twelve million, six hundred ninety-nine thousand, six hundred forty-eight".