1140403440 has 160 divisors (see below), whose sum is σ = 3874252032. Its totient is φ = 275200000.

The previous prime is 1140403409. The next prime is 1140403463. The reversal of 1140403440 is 443040411.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 661780 + ... + 663500.

Almost surely, 2^1140403440 is an apocalyptic number.

1140403440 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 1140403440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1937126016).

1140403440 is an abundant number, since it is smaller than the sum of its proper divisors (2733848592).

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

1140403440 is a wasteful number, since it uses less digits than its factorization.

1140403440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1999 (or 1993 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 1140403440 is about 33769.8599345630. The cubic root of 1140403440 is about 1044.7671436174.

Adding to 1140403440 its reverse (443040411), we get a palindrome (1583443851).

The spelling of 1140403440 in words is "one billion, one hundred forty million, four hundred three thousand, four hundred forty".