11386997240 has 64 divisors (see below), whose sum is σ = 26343515520. Its totient is φ = 4427136000.

The previous prime is 11386997207. The next prime is 11386997243. The reversal of 11386997240 is 4279968311.

It is a super-2 number, since 2×11386997240² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11386997243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 431630 + ... + 457250.

It is an arithmetic number, because the mean of its divisors is an integer number (411617430).

Almost surely, 2^11386997240 is an apocalyptic number.

11386997240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11386997240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13171757760).

11386997240 is an abundant number, since it is smaller than the sum of its proper divisors (14956518280).

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

11386997240 is a wasteful number, since it uses less digits than its factorization.

11386997240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25944 (or 25940 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 50.

The spelling of 11386997240 in words is "eleven billion, three hundred eighty-six million, nine hundred ninety-seven thousand, two hundred forty".