11515290 has 64 divisors (see below), whose sum is σ = 29787264. Its totient is φ = 2838528.

The previous prime is 11515289. The next prime is 11515303. The reversal of 11515290 is 9251511.

It is a self number, because there is not a number n which added to its sum of digits gives 11515290.

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, 34002 + ... + 34338.

It is an arithmetic number, because the mean of its divisors is an integer number (465426).

Almost surely, 2^11515290 is an apocalyptic number.

11515290 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 11515290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14893632).

11515290 is an abundant number, since it is smaller than the sum of its proper divisors (18271974).

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

11515290 is a wasteful number, since it uses less digits than its factorization.

11515290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431.

The product of its (nonzero) digits is 450, while the sum is 24.

The square root of 11515290 is about 3393.4186302312. The cubic root of 11515290 is about 225.8178630156.

It can be divided in two parts, 1151 and 5290, that added together give a triangular number (6441 = T₁₁₃).

The spelling of 11515290 in words is "eleven million, five hundred fifteen thousand, two hundred ninety".