11815798 has 8 divisors (see below), whose sum is σ = 18136008. Its totient is φ = 5770464.

The previous prime is 11815781. The next prime is 11815819. The reversal of 11815798 is 89751811.

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

It is a super-2 number, since 2×11815798² = 279226164753608, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11815798.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68611 + ... + 68782.

It is an arithmetic number, because the mean of its divisors is an integer number (2267001).

Almost surely, 2^11815798 is an apocalyptic number.

11815798 is a deficient number, since it is larger than the sum of its proper divisors (6320210).

11815798 is a wasteful number, since it uses less digits than its factorization.

11815798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137438.

The product of its digits is 20160, while the sum is 40.

The square root of 11815798 is about 3437.4115261342. The cubic root of 11815798 is about 227.7653659881.

The spelling of 11815798 in words is "eleven million, eight hundred fifteen thousand, seven hundred ninety-eight".