11728615 has 16 divisors (see below), whose sum is σ = 14878080. Its totient is φ = 8861440.

The previous prime is 11728601. The next prime is 11728621. The reversal of 11728615 is 51682711.

It is not a de Polignac number, because 11728615 - 2¹¹ = 11726567 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5955 + ... + 7675.

It is an arithmetic number, because the mean of its divisors is an integer number (929880).

It is a vampire number, since it can be written as 1721 ⋅ 6815 (with its own digits).

Almost surely, 2^11728615 is an apocalyptic number.

11728615 is a deficient number, since it is larger than the sum of its proper divisors (3149465).

11728615 is a wasteful number, since it uses less digits than its factorization.

11728615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1802.

The product of its digits is 3360, while the sum is 31.

The square root of 11728615 is about 3424.7065567724. The cubic root of 11728615 is about 227.2037927419.

The spelling of 11728615 in words is "eleven million, seven hundred twenty-eight thousand, six hundred fifteen".