1143623556 has 24 divisors (see below), whose sum is σ = 2964950240. Its totient is φ = 381207816.

The previous prime is 1143623543. The next prime is 1143623557. The reversal of 1143623556 is 6553263411.

1143623556 is a `hidden beast` number, since 1 + 1 + 43 + 62 + 3 + 556 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1143623556.

It is not an unprimeable number, because it can be changed into a prime (1143623557) 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, 5294446 + ... + 5294661.

Almost surely, 2^1143623556 is an apocalyptic number.

It is an amenable number.

1143623556 is an abundant number, since it is smaller than the sum of its proper divisors (1821326684).

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

1143623556 is a wasteful number, since it uses less digits than its factorization.

1143623556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10589120 (or 10589112 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 1143623556 is about 33817.5036926146. The cubic root of 1143623556 is about 1045.7495765915.

Adding to 1143623556 its reverse (6553263411), we get a palindrome (7696886967).

The spelling of 1143623556 in words is "one billion, one hundred forty-three million, six hundred twenty-three thousand, five hundred fifty-six".