1011568840 has 32 divisors (see below), whose sum is σ = 2277579960. Its totient is φ = 404352000.

The previous prime is 1011568837. The next prime is 1011568849. The reversal of 1011568840 is 488651101.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1009078756 + 2490084 = 31766^2 + 1578^2 .

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1011568796 and 1011568805.

It is not an unprimeable number, because it can be changed into a prime (1011568849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57040 + ... + 72640.

Almost surely, 2^1011568840 is an apocalyptic number.

1011568840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1011568840 is an abundant number, since it is smaller than the sum of its proper divisors (1266011120).

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

1011568840 is a wasteful number, since it uses less digits than its factorization.

1011568840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17233 (or 17229 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 34.

The square root of 1011568840 is about 31805.1700199826. The cubic root of 1011568840 is about 1003.8415039508.

The spelling of 1011568840 in words is "one billion, eleven million, five hundred sixty-eight thousand, eight hundred forty".