1143695385 has 24 divisors (see below), whose sum is σ = 2265606720. Its totient is φ = 522832032.

The previous prime is 1143695351. The next prime is 1143695389. The reversal of 1143695385 is 5835963411.

1143695385 is a `hidden beast` number, since 11 + 43 + 69 + 538 + 5 = 666.

It is not a de Polignac number, because 1143695385 - 2¹⁰ = 1143694361 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1143695385.

It is not an unprimeable number, because it can be changed into a prime (1143695389) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1815075 + ... + 1815704.

It is an arithmetic number, because the mean of its divisors is an integer number (94400280).

Almost surely, 2^1143695385 is an apocalyptic number.

1143695385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1143695385 is a deficient number, since it is larger than the sum of its proper divisors (1121911335).

1143695385 is a wasteful number, since it uses less digits than its factorization.

1143695385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3630797 (or 3630794 counting only the distinct ones).

The product of its digits is 388800, while the sum is 45.

The square root of 1143695385 is about 33818.5656851381. The cubic root of 1143695385 is about 1045.7714700351.

The spelling of 1143695385 in words is "one billion, one hundred forty-three million, six hundred ninety-five thousand, three hundred eighty-five".