1109749420 has 24 divisors (see below), whose sum is σ = 2509741584. Its totient is φ = 409753536.

The previous prime is 1109749411. The next prime is 1109749429. The reversal of 1109749420 is 249479011.

It is an interprime number because it is at equal distance from previous prime (1109749411) and next prime (1109749429).

It is a self number, because there is not a number n which added to its sum of digits gives 1109749420.

It is not an unprimeable number, because it can be changed into a prime (1109749429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2133874 + ... + 2134393.

It is an arithmetic number, because the mean of its divisors is an integer number (104572566).

Almost surely, 2^1109749420 is an apocalyptic number.

1109749420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1109749420 is an abundant number, since it is smaller than the sum of its proper divisors (1399992164).

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

1109749420 is a wasteful number, since it uses less digits than its factorization.

1109749420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4268289 (or 4268287 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 1109749420 is about 33312.9017048951. The cubic root of 1109749420 is about 1035.3208866020.

The spelling of 1109749420 in words is "one billion, one hundred nine million, seven hundred forty-nine thousand, four hundred twenty".