11998590 has 16 divisors (see below), whose sum is σ = 28796688. Its totient is φ = 3199616.

The previous prime is 11998589. The next prime is 11998601. The reversal of 11998590 is 9589911.

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, 199947 + ... + 200006.

It is an arithmetic number, because the mean of its divisors is an integer number (1799793).

Almost surely, 2^11998590 is an apocalyptic number.

11998590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11998590 is an abundant number, since it is smaller than the sum of its proper divisors (16798098).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11998590 is a wasteful number, since it uses less digits than its factorization.

11998590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399963.

The product of its (nonzero) digits is 29160, while the sum is 42.

The square root of 11998590 is about 3463.8980931892. The cubic root of 11998590 is about 228.9338812312.

The spelling of 11998590 in words is "eleven million, nine hundred ninety-eight thousand, five hundred ninety".