11916815 has 8 divisors (see below), whose sum is σ = 14322528. Its totient is φ = 9518560.

The previous prime is 11916799. The next prime is 11916823. The reversal of 11916815 is 51861911.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11916815 - 2⁴ = 11916799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2654 + ... + 5556.

It is an arithmetic number, because the mean of its divisors is an integer number (1790316).

Almost surely, 2^11916815 is an apocalyptic number.

11916815 is a deficient number, since it is larger than the sum of its proper divisors (2405713).

11916815 is an equidigital number, since it uses as much as digits as its factorization.

11916815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3729.

The product of its digits is 2160, while the sum is 32.

The square root of 11916815 is about 3452.0740142703. The cubic root of 11916815 is about 228.4126044164.

The spelling of 11916815 in words is "eleven million, nine hundred sixteen thousand, eight hundred fifteen".