11385805290 has 64 divisors (see below), whose sum is σ = 28788186240. Its totient is φ = 2874009600.

The previous prime is 11385805289. The next prime is 11385805303. The reversal of 11385805290 is 9250858311.

It is a Curzon 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, 731590 + ... + 746990.

It is an arithmetic number, because the mean of its divisors is an integer number (449815410).

Almost surely, 2^11385805290 is an apocalyptic number.

11385805290 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 11385805290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14394093120).

11385805290 is an abundant number, since it is smaller than the sum of its proper divisors (17402380950).

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

11385805290 is a wasteful number, since it uses less digits than its factorization.

11385805290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16727.

The product of its (nonzero) digits is 86400, while the sum is 42.

The spelling of 11385805290 in words is "eleven billion, three hundred eighty-five million, eight hundred five thousand, two hundred ninety".