1120644440 has 16 divisors (see below), whose sum is σ = 2521450080. Its totient is φ = 448257760.

The previous prime is 1120644401. The next prime is 1120644443. The reversal of 1120644440 is 444460211.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1120644443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14008016 + ... + 14008095.

It is an arithmetic number, because the mean of its divisors is an integer number (157590630).

Almost surely, 2^1120644440 is an apocalyptic number.

1120644440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1120644440 is an abundant number, since it is smaller than the sum of its proper divisors (1400805640).

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

1120644440 is a wasteful number, since it uses less digits than its factorization.

1120644440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28016122 (or 28016118 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 26.

The square root of 1120644440 is about 33476.0278408296. The cubic root of 1120644440 is about 1038.6979637810.

The spelling of 1120644440 in words is "one billion, one hundred twenty million, six hundred forty-four thousand, four hundred forty".