1143012440 has 16 divisors (see below), whose sum is σ = 2571778080. Its totient is φ = 457204960.

The previous prime is 1143012421. The next prime is 1143012491. The reversal of 1143012440 is 442103411.

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

It is a congruent number.

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, 14287616 + ... + 14287695.

It is an arithmetic number, because the mean of its divisors is an integer number (160736130).

Almost surely, 2^1143012440 is an apocalyptic number.

1143012440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1143012440 is an abundant number, since it is smaller than the sum of its proper divisors (1428765640).

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

1143012440 is a wasteful number, since it uses less digits than its factorization.

1143012440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28575322 (or 28575318 counting only the distinct ones).

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

The square root of 1143012440 is about 33808.4669868363. The cubic root of 1143012440 is about 1045.5632716480.

Adding to 1143012440 its reverse (442103411), we get a palindrome (1585115851).

The spelling of 1143012440 in words is "one billion, one hundred forty-three million, twelve thousand, four hundred forty".