1144332857 has 8 divisors (see below), whose sum is σ = 1149852384. Its totient is φ = 1138824288.

The previous prime is 1144332809. The next prime is 1144332863. The reversal of 1144332857 is 7582334411.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1144332857 - 2¹⁰ = 1144331833 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1144332857.

It is not an unprimeable number, because it can be changed into a prime (1144332557) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 267578 + ... + 271820.

It is an arithmetic number, because the mean of its divisors is an integer number (143731548).

Almost surely, 2^1144332857 is an apocalyptic number.

It is an amenable number.

1144332857 is a deficient number, since it is larger than the sum of its proper divisors (5519527).

1144332857 is an equidigital number, since it uses as much as digits as its factorization.

1144332857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5479.

The product of its digits is 80640, while the sum is 38.

The square root of 1144332857 is about 33827.9892544621. The cubic root of 1144332857 is about 1045.9657310300.

The spelling of 1144332857 in words is "one billion, one hundred forty-four million, three hundred thirty-two thousand, eight hundred fifty-seven".