1143699840 has 384 divisors, whose sum is σ = 4210315200. Its totient is φ = 285474816.

The previous prime is 1143699829. The next prime is 1143699847. The reversal of 1143699840 is 489963411.

It is a tau number, because it is divible by the number of its divisors (384).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143699847) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11790672 + ... + 11790768.

Almost surely, 2^1143699840 is an apocalyptic number.

1143699840 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 1143699840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2105157600).

1143699840 is an abundant number, since it is smaller than the sum of its proper divisors (3066615360).

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

1143699840 is a wasteful number, since it uses less digits than its factorization.

1143699840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234 (or 219 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 1143699840 is about 33818.6315512618. The cubic root of 1143699840 is about 1045.7728278868.

The spelling of 1143699840 in words is "one billion, one hundred forty-three million, six hundred ninety-nine thousand, eight hundred forty".