1143999072 has 96 divisors (see below), whose sum is σ = 3347416800. Its totient is φ = 380104704.

The previous prime is 1143999049. The next prime is 1143999083. The reversal of 1143999072 is 2709993411.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×1143999072² = 2617467753473722368, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 289204 + ... + 293132.

It is an arithmetic number, because the mean of its divisors is an integer number (34868925).

Almost surely, 2^1143999072 is an apocalyptic number.

1143999072 is a gapful number since it is divisible by the number (12) 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 1143999072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1673708400).

1143999072 is an abundant number, since it is smaller than the sum of its proper divisors (2203417728).

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

1143999072 is a wasteful number, since it uses less digits than its factorization.

1143999072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4285 (or 4271 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The square root of 1143999072 is about 33823.0553321252. The cubic root of 1143999072 is about 1045.8640235533.

The spelling of 1143999072 in words is "one billion, one hundred forty-three million, nine hundred ninety-nine thousand, seventy-two".