1140266556 has 72 divisors (see below), whose sum is σ = 3386261424. Its totient is φ = 318954240.

The previous prime is 1140266537. The next prime is 1140266563. The reversal of 1140266556 is 6556620411.

1140266556 is a `hidden beast` number, since 1 + 1 + 40 + 2 + 66 + 556 = 666.

It is a super-2 number, since 2×1140266556² = 2600415637464202272, which contains 22 as substring.

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 1140266556.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 105601 + ... + 115896.

Almost surely, 2^1140266556 is an apocalyptic number.

It is an amenable number.

1140266556 is an abundant number, since it is smaller than the sum of its proper divisors (2245994868).

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

1140266556 is a wasteful number, since it uses less digits than its factorization.

1140266556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221531 (or 221526 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 1140266556 is about 33767.8331552381. The cubic root of 1140266556 is about 1044.7253403914.

Adding to 1140266556 its reverse (6556620411), we get a palindrome (7696886967).

The spelling of 1140266556 in words is "one billion, one hundred forty million, two hundred sixty-six thousand, five hundred fifty-six".