11973990 has 64 divisors (see below), whose sum is σ = 34583040. Its totient is φ = 2592000.

The previous prime is 11973989. The next prime is 11974003. The reversal of 11973990 is 9937911.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2490 + ... + 5490.

It is an arithmetic number, because the mean of its divisors is an integer number (540360).

Almost surely, 2^11973990 is an apocalyptic number.

11973990 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 11973990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17291520).

11973990 is an abundant number, since it is smaller than the sum of its proper divisors (22609050).

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

11973990 is a wasteful number, since it uses less digits than its factorization.

11973990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3037.

The product of its (nonzero) digits is 15309, while the sum is 39.

The square root of 11973990 is about 3460.3453584866. The cubic root of 11973990 is about 228.7773176489. Note that the first 3 decimals are identical.

The spelling of 11973990 in words is "eleven million, nine hundred seventy-three thousand, nine hundred ninety".