11997790 has 32 divisors (see below), whose sum is σ = 24940224. Its totient is φ = 4070400.

The previous prime is 11997787. The next prime is 11997829. The reversal of 11997790 is 9779911.

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 15 ways as a sum of consecutive naturals, for example, 6222 + ... + 7918.

It is an arithmetic number, because the mean of its divisors is an integer number (779382).

Almost surely, 2^11997790 is an apocalyptic number.

11997790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11997790 is an abundant number, since it is smaller than the sum of its proper divisors (12942434).

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

11997790 is a wasteful number, since it uses less digits than its factorization.

11997790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1812.

The product of its (nonzero) digits is 35721, while the sum is 43.

The square root of 11997790 is about 3463.7826144260. The cubic root of 11997790 is about 228.9287931007.

The spelling of 11997790 in words is "eleven million, nine hundred ninety-seven thousand, seven hundred ninety".