1143990000 has 400 divisors, whose sum is σ = 4338611200. Its totient is φ = 287712000.

The previous prime is 1143989969. The next prime is 1143990041. The reversal of 1143990000 is 993411.

It is a tau number, because it is divible by the number of its divisors (400).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 5129889 + ... + 5130111.

It is an arithmetic number, because the mean of its divisors is an integer number (10846528).

Almost surely, 2^1143990000 is an apocalyptic number.

1143990000 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 1143990000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2169305600).

1143990000 is an abundant number, since it is smaller than the sum of its proper divisors (3194621200).

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

1143990000 is a wasteful number, since it uses less digits than its factorization.

1143990000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279 (or 252 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 1143990000 is about 33822.9212221535. The cubic root of 1143990000 is about 1045.8612589521.

The spelling of 1143990000 in words is "one billion, one hundred forty-three million, nine hundred ninety thousand".