1143400788 has 72 divisors (see below), whose sum is σ = 3037562528. Its totient is φ = 362190528.

The previous prime is 1143400787. The next prime is 1143400793. The reversal of 1143400788 is 8870043411.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143400787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 47295 + ... + 67257.

Almost surely, 2^1143400788 is an apocalyptic number.

1143400788 is a gapful number since it is divisible by the number (18) 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 1143400788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1518781264).

1143400788 is an abundant number, since it is smaller than the sum of its proper divisors (1894161740).

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

1143400788 is a wasteful number, since it uses less digits than its factorization.

1143400788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20053 (or 20048 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 1143400788 is about 33814.2098532555. The cubic root of 1143400788 is about 1045.6816711843.

The spelling of 1143400788 in words is "one billion, one hundred forty-three million, four hundred thousand, seven hundred eighty-eight".