1109990745 has 48 divisors (see below), whose sum is σ = 1978848144. Its totient is φ = 575232000.

The previous prime is 1109990719. The next prime is 1109990759. The reversal of 1109990745 is 5470999011.

It can be written as a sum of positive squares in 8 ways, for example, as 501264 + 1109489481 = 708^2 + 33309^2 .

It is not a de Polignac number, because 1109990745 - 2⁸ = 1109990489 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1109990745.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 517375 + ... + 519515.

It is an arithmetic number, because the mean of its divisors is an integer number (41226003).

Almost surely, 2^1109990745 is an apocalyptic number.

1109990745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1109990745 is a deficient number, since it is larger than the sum of its proper divisors (868857399).

1109990745 is a wasteful number, since it uses less digits than its factorization.

1109990745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2474 (or 2471 counting only the distinct ones).

The product of its (nonzero) digits is 102060, while the sum is 45.

The square root of 1109990745 is about 33316.5236031612. The cubic root of 1109990745 is about 1035.3959277780.

The spelling of 1109990745 in words is "one billion, one hundred nine million, nine hundred ninety thousand, seven hundred forty-five".