1101944640 has 112 divisors (see below), whose sum is σ = 3507345792. Its totient is φ = 293124096.

The previous prime is 1101944629. The next prime is 1101944647. The reversal of 1101944640 is 464491011.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1101944598 and 1101944607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101944647) 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 15 ways as a sum of consecutive naturals, for example, 466342 + ... + 468698.

Almost surely, 2^1101944640 is an apocalyptic number.

1101944640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1101944640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1753672896).

1101944640 is an abundant number, since it is smaller than the sum of its proper divisors (2405401152).

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

1101944640 is a wasteful number, since it uses less digits than its factorization.

1101944640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2864 (or 2854 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 1101944640 is about 33195.5515092007. The cubic root of 1101944640 is about 1032.8880643733. Note that the first 3 decimals are identical.

The spelling of 1101944640 in words is "one billion, one hundred one million, nine hundred forty-four thousand, six hundred forty".