11943990 has 64 divisors (see below), whose sum is σ = 32901120. Its totient is φ = 3080160.

The previous prime is 11943977. The next prime is 11943991. The reversal of 11943990 is 9934911.

It is a zygodrome in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11943991) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7657 + ... + 9083.

It is an arithmetic number, because the mean of its divisors is an integer number (514080).

Almost surely, 2^11943990 is an apocalyptic number.

11943990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 11943990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16450560).

11943990 is an abundant number, since it is smaller than the sum of its proper divisors (20957130).

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

11943990 is a wasteful number, since it uses less digits than its factorization.

11943990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1474 (or 1468 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 36.

The square root of 11943990 is about 3456.0078124912. The cubic root of 11943990 is about 228.5860959710.

It can be divided in two parts, 1194 and 3990, that added together give a square (5184 = 72²).

The spelling of 11943990 in words is "eleven million, nine hundred forty-three thousand, nine hundred ninety".