1143157840 has 80 divisors (see below), whose sum is σ = 2904814080. Its totient is φ = 414927360.

The previous prime is 1143157837. The next prime is 1143157849. The reversal of 1143157840 is 487513411.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 1143157796 and 1143157805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143157849) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 728737 + ... + 730303.

It is an arithmetic number, because the mean of its divisors is an integer number (36310176).

Almost surely, 2^1143157840 is an apocalyptic number.

1143157840 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 1143157840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1452407040).

1143157840 is an abundant number, since it is smaller than the sum of its proper divisors (1761656240).

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

1143157840 is a wasteful number, since it uses less digits than its factorization.

1143157840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2420 (or 2414 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 1143157840 is about 33810.6172673614. The cubic root of 1143157840 is about 1045.6076043396.

The spelling of 1143157840 in words is "one billion, one hundred forty-three million, one hundred fifty-seven thousand, eight hundred forty".