1011100040 has 16 divisors (see below), whose sum is σ = 2274975180. Its totient is φ = 404440000.

The previous prime is 1011100019. The next prime is 1011100043. The reversal of 1011100040 is 400011101.

It can be written as a sum of positive squares in 2 ways, for example, as 852289636 + 158810404 = 29194^2 + 12602^2 .

It is a Harshad number since it is a multiple of its sum of digits (8).

It is not an unprimeable number, because it can be changed into a prime (1011100043) 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 3 ways as a sum of consecutive naturals, for example, 12638711 + ... + 12638790.

Almost surely, 2^1011100040 is an apocalyptic number.

1011100040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1011100040 is an abundant number, since it is smaller than the sum of its proper divisors (1263875140).

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

1011100040 is a wasteful number, since it uses less digits than its factorization.

1011100040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25277512 (or 25277508 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 1011100040 is about 31797.7992949198. The cubic root of 1011100040 is about 1003.6864070376.

Adding to 1011100040 its reverse (400011101), we get a palindrome (1411111141).

The spelling of 1011100040 in words is "one billion, eleven million, one hundred thousand, forty".