1105840720 has 40 divisors (see below), whose sum is σ = 2595128544. Its totient is φ = 438198912.

The previous prime is 1105840693. The next prime is 1105840727. The reversal of 1105840720 is 270485011.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1105840727) 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 7 ways as a sum of consecutive naturals, for example, 56034 + ... + 73153.

Almost surely, 2^1105840720 is an apocalyptic number.

1105840720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1105840720 is an abundant number, since it is smaller than the sum of its proper divisors (1489287824).

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

1105840720 is a wasteful number, since it uses less digits than its factorization.

1105840720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129307 (or 129301 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 1105840720 is about 33254.1834962159. The cubic root of 1105840720 is about 1034.1039394584.

The spelling of 1105840720 in words is "one billion, one hundred five million, eight hundred forty thousand, seven hundred twenty".