1109642904 has 96 divisors (see below), whose sum is σ = 3193510320. Its totient is φ = 346871808.

The previous prime is 1109642899. The next prime is 1109642909. The reversal of 1109642904 is 4092469011.

It is a happy number.

1109642904 is a `hidden beast` number, since 1 + 1 + 0 + 9 + 642 + 9 + 0 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (1109642899) and next prime (1109642909).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1109642909) 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 23 ways as a sum of consecutive naturals, for example, 374292 + ... + 377244.

Almost surely, 2^1109642904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1109642904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1596755160).

1109642904 is an abundant number, since it is smaller than the sum of its proper divisors (2083867416).

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

1109642904 is a wasteful number, since it uses less digits than its factorization.

1109642904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3289 (or 3282 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 1109642904 is about 33311.3029465976. The cubic root of 1109642904 is about 1035.2877614760.

The spelling of 1109642904 in words is "one billion, one hundred nine million, six hundred forty-two thousand, nine hundred four".