11139840 has 108 divisors (see below), whose sum is σ = 38582544. Its totient is φ = 2967552.

The previous prime is 11139839. The next prime is 11139851. The reversal of 11139840 is 4893111.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11037 + ... + 12003.

Almost surely, 2^11139840 is an apocalyptic number.

11139840 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 11139840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19291272).

11139840 is an abundant number, since it is smaller than the sum of its proper divisors (27442704).

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

11139840 is an equidigital number, since it uses as much as digits as its factorization.

11139840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 994 (or 977 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 11139840 is about 3337.6398847090. The cubic root of 11139840 is about 223.3364718254.

The spelling of 11139840 in words is "eleven million, one hundred thirty-nine thousand, eight hundred forty".