11390640 has 80 divisors (see below), whose sum is σ = 36473856. Its totient is φ = 2937600.

The previous prime is 11390593. The next prime is 11390641. The reversal of 11390640 is 4609311.

It is a tau number, because it is divible by the number of its divisors (80).

It is a hoax number, since the sum of its digits (24) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 11390640.

It is not an unprimeable number, because it can be changed into a prime (11390641) 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 15 ways as a sum of consecutive naturals, for example, 6675 + ... + 8205.

Almost surely, 2^11390640 is an apocalyptic number.

11390640 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 11390640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18236928).

11390640 is an abundant number, since it is smaller than the sum of its proper divisors (25083216).

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

11390640 is a wasteful number, since it uses less digits than its factorization.

11390640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1578 (or 1572 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 11390640 is about 3375.0022222215. The cubic root of 11390640 is about 225.0000987654. Note that the first 4 decimals are identical.

Adding to 11390640 its reverse (4609311), we get a palindrome (15999951).

The spelling of 11390640 in words is "eleven million, three hundred ninety thousand, six hundred forty".