1100020240 has 40 divisors (see below), whose sum is σ = 2790053568. Its totient is φ = 400007040.

The previous prime is 1100020217. The next prime is 1100020277. The reversal of 1100020240 is 420200011.

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 an unprimeable number.

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, 624132 + ... + 625891.

Almost surely, 2^1100020240 is an apocalyptic number.

1100020240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1100020240 is an abundant number, since it is smaller than the sum of its proper divisors (1690033328).

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

1100020240 is a wasteful number, since it uses less digits than its factorization.

1100020240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1250047 (or 1250041 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 1100020240 is about 33166.5530316311. The cubic root of 1100020240 is about 1032.2864467356.

Adding to 1100020240 its reverse (420200011), we get a palindrome (1520220251).

The spelling of 1100020240 in words is "one billion, one hundred million, twenty thousand, two hundred forty".