1140123440 has 20 divisors (see below), whose sum is σ = 2650787184. Its totient is φ = 456049344.

The previous prime is 1140123437. The next prime is 1140123469. The reversal of 1140123440 is 443210411.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7125692 + ... + 7125851.

Almost surely, 2^1140123440 is an apocalyptic number.

1140123440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1140123440 is an abundant number, since it is smaller than the sum of its proper divisors (1510663744).

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

1140123440 is a wasteful number, since it uses less digits than its factorization.

1140123440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14251556 (or 14251550 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1140123440 is about 33765.7139714237. The cubic root of 1140123440 is about 1044.6816303873.

Adding to 1140123440 its reverse (443210411), we get a palindrome (1583333851).

The spelling of 1140123440 in words is "one billion, one hundred forty million, one hundred twenty-three thousand, four hundred forty".