1011100240 has 40 divisors (see below), whose sum is σ = 2453021568. Its totient is φ = 386855040.

The previous prime is 1011100229. The next prime is 1011100243. The reversal of 1011100240 is 420011101.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011100243) 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, 272916 + ... + 276595.

Almost surely, 2^1011100240 is an apocalyptic number.

1011100240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1011100240 is an abundant number, since it is smaller than the sum of its proper divisors (1441921328).

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

1011100240 is a wasteful number, since it uses less digits than its factorization.

1011100240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549547 (or 549541 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 1011100240 is about 31797.8024397913. The cubic root of 1011100240 is about 1003.6864732154.

Adding to 1011100240 its reverse (420011101), we get a palindrome (1431111341).

The spelling of 1011100240 in words is "one billion, eleven million, one hundred thousand, two hundred forty".