1100020040 has 64 divisors (see below), whose sum is σ = 2868514560. Its totient is φ = 371831040.

The previous prime is 1100020039. The next prime is 1100020063. The reversal of 1100020040 is 400200011.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7787 + ... + 47546.

It is an arithmetic number, because the mean of its divisors is an integer number (44820540).

Almost surely, 2^1100020040 is an apocalyptic number.

1100020040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1100020040 is an abundant number, since it is smaller than the sum of its proper divisors (1768494520).

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

1100020040 is a wasteful number, since it uses less digits than its factorization.

1100020040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55422 (or 55418 counting only the distinct ones).

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

The square root of 1100020040 is about 33166.5500165453. The cubic root of 1100020040 is about 1032.2863841739.

Adding to 1100020040 its reverse (400200011), we get a palindrome (1500220051).

The spelling of 1100020040 in words is "one billion, one hundred million, twenty thousand, forty".