11139780 has 48 divisors (see below), whose sum is σ = 31336704. Its totient is φ = 2956800.

The previous prime is 11139773. The next prime is 11139787. The reversal of 11139780 is 8793111.

It is an interprime number because it is at equal distance from previous prime (11139773) and next prime (11139787).

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (11139787) 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, 23829 + ... + 24291.

It is an arithmetic number, because the mean of its divisors is an integer number (652848).

Almost surely, 2^11139780 is an apocalyptic number.

11139780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11139780 is an abundant number, since it is smaller than the sum of its proper divisors (20196924).

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

11139780 is a wasteful number, since it uses less digits than its factorization.

11139780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 876 (or 874 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 30.

The square root of 11139780 is about 3337.6308963095. The cubic root of 11139780 is about 223.3360708558.

The spelling of 11139780 in words is "eleven million, one hundred thirty-nine thousand, seven hundred eighty".