1126987778 has 16 divisors (see below), whose sum is σ = 1955257920. Its totient is φ = 477175056.

The previous prime is 1126987777. The next prime is 1126987781. The reversal of 1126987778 is 8777896211.

It is a super-2 number, since 2×1126987778² = 2540202903522754568, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1126987777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 483773 + ... + 486096.

It is an arithmetic number, because the mean of its divisors is an integer number (122203620).

Almost surely, 2^1126987778 is an apocalyptic number.

1126987778 is a deficient number, since it is larger than the sum of its proper divisors (828270142).

1126987778 is an equidigital number, since it uses as much as digits as its factorization.

1126987778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 969961.

The product of its digits is 2370816, while the sum is 56.

The square root of 1126987778 is about 33570.6386296120. The cubic root of 1126987778 is about 1040.6541058968.

The spelling of 1126987778 in words is "one billion, one hundred twenty-six million, nine hundred eighty-seven thousand, seven hundred seventy-eight".