1140440778 has 24 divisors (see below), whose sum is σ = 2486699748. Its totient is φ = 377724672.

The previous prime is 1140440773. The next prime is 1140440827. The reversal of 1140440778 is 8770440411.

1140440778 is a `hidden beast` number, since 1 + 140 + 440 + 7 + 78 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 990549729 + 149891049 = 31473^2 + 12243^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1140440773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 198951 + ... + 204602.

Almost surely, 2^1140440778 is an apocalyptic number.

1140440778 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1140440778 is an abundant number, since it is smaller than the sum of its proper divisors (1346258970).

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

1140440778 is a wasteful number, since it uses less digits than its factorization.

1140440778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403718 (or 403715 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 36.

The square root of 1140440778 is about 33770.4127602847. The cubic root of 1140440778 is about 1044.7785457489.

The spelling of 1140440778 in words is "one billion, one hundred forty million, four hundred forty thousand, seven hundred seventy-eight".