12823615 has 32 divisors (see below), whose sum is σ = 18579456. Its totient is φ = 8311680.

The previous prime is 12823609. The next prime is 12823619. The reversal of 12823615 is 51632821.

12823615 = 120² + 121² + ... + 342².

It is not a de Polignac number, because 12823615 - 2³ = 12823607 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12823619) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 57394 + ... + 57616.

It is an arithmetic number, because the mean of its divisors is an integer number (580608).

Almost surely, 2^12823615 is an apocalyptic number.

12823615 is a deficient number, since it is larger than the sum of its proper divisors (5755841).

12823615 is a wasteful number, since it uses less digits than its factorization.

12823615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319.

The product of its digits is 2880, while the sum is 28.

The square root of 12823615 is about 3581.0075397854. The cubic root of 12823615 is about 234.0651862612.

The spelling of 12823615 in words is "twelve million, eight hundred twenty-three thousand, six hundred fifteen".