11717998 has 16 divisors (see below), whose sum is σ = 18790704. Its totient is φ = 5461120.

The previous prime is 11717989. The next prime is 11717999. The reversal of 11717998 is 89971711.

It is a super-2 number, since 2×11717998² = 274622954256008, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11717999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2028 + ... + 5248.

It is an arithmetic number, because the mean of its divisors is an integer number (1174419).

Almost surely, 2^11717998 is an apocalyptic number.

11717998 is a deficient number, since it is larger than the sum of its proper divisors (7072706).

11717998 is a wasteful number, since it uses less digits than its factorization.

11717998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3347.

The product of its digits is 31752, while the sum is 43.

The square root of 11717998 is about 3423.1561460150. The cubic root of 11717998 is about 227.1352154234.

The spelling of 11717998 in words is "eleven million, seven hundred seventeen thousand, nine hundred ninety-eight".