1140491556 has 48 divisors (see below), whose sum is σ = 2997355200. Its totient is φ = 374953536.

The previous prime is 1140491551. The next prime is 1140491579. The reversal of 1140491556 is 6551940411.

1140491556 is a `hidden beast` number, since 1 + 14 + 0 + 4 + 91 + 556 = 666.

It is a super-2 number, since 2×1140491556² = 2601441978614602272, which contains 22 as substring.

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 1140491556.

It is not an unprimeable number, because it can be changed into a prime (1140491551) 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, 64446 + ... + 80213.

It is an arithmetic number, because the mean of its divisors is an integer number (62444900).

Almost surely, 2^1140491556 is an apocalyptic number.

It is an amenable number.

1140491556 is an abundant number, since it is smaller than the sum of its proper divisors (1856863644).

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

1140491556 is a wasteful number, since it uses less digits than its factorization.

1140491556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144745 (or 144737 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 1140491556 is about 33771.1645638702. The cubic root of 1140491556 is about 1044.7940517353.

The spelling of 1140491556 in words is "one billion, one hundred forty million, four hundred ninety-one thousand, five hundred fifty-six".