11385990 has 192 divisors, whose sum is σ = 38817792. Its totient is φ = 2246400.

The previous prime is 11385961. The next prime is 11385991. The reversal of 11385990 is 9958311.

It is a happy number.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11385991) by changing a digit.

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 95 ways as a sum of consecutive naturals, for example, 214804 + ... + 214856.

It is an arithmetic number, because the mean of its divisors is an integer number (202176).

Almost surely, 2^11385990 is an apocalyptic number.

11385990 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 11385990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19408896).

11385990 is an abundant number, since it is smaller than the sum of its proper divisors (27431802).

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

11385990 is a wasteful number, since it uses less digits than its factorization.

11385990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115 (or 112 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 36.

The square root of 11385990 is about 3374.3132634656. The cubic root of 11385990 is about 224.9694773411.

The spelling of 11385990 in words is "eleven million, three hundred eighty-five thousand, nine hundred ninety".