1140231640 has 64 divisors (see below), whose sum is σ = 2617725600. Its totient is φ = 446865408.

The previous prime is 1140231637. The next prime is 1140231641. The reversal of 1140231640 is 461320411.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1140231641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 936312 + ... + 937528.

Almost surely, 2^1140231640 is an apocalyptic number.

1140231640 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 1140231640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1308862800).

1140231640 is an abundant number, since it is smaller than the sum of its proper divisors (1477493960).

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

1140231640 is a wasteful number, since it uses less digits than its factorization.

1140231640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1684 (or 1680 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 1140231640 is about 33767.3161503842. The cubic root of 1140231640 is about 1044.7146768023.

The spelling of 1140231640 in words is "one billion, one hundred forty million, two hundred thirty-one thousand, six hundred forty".