1111000640 has 56 divisors (see below), whose sum is σ = 2659425720. Its totient is φ = 442073088.

The previous prime is 1111000603. The next prime is 1111000753. The reversal of 1111000640 is 460001111.

It can be written as a sum of positive squares in 4 ways, for example, as 116985856 + 994014784 = 10816^2 + 31528^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52766 + ... + 70754.

It is an arithmetic number, because the mean of its divisors is an integer number (47489745).

Almost surely, 2^1111000640 is an apocalyptic number.

1111000640 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 1111000640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1329712860).

1111000640 is an abundant number, since it is smaller than the sum of its proper divisors (1548425080).

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

1111000640 is a wasteful number, since it uses less digits than its factorization.

1111000640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18199 (or 18189 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 1111000640 is about 33331.6762254766. The cubic root of 1111000640 is about 1035.7098415709.

Adding to 1111000640 its reverse (460001111), we get a palindrome (1571001751).

The spelling of 1111000640 in words is "one billion, one hundred eleven million, six hundred forty", and thus it is an aban number.