1099404000 has 144 divisors (see below), whose sum is σ = 3901912560. Its totient is φ = 293164800.

The previous prime is 1099403993. The next prime is 1099404029. The reversal of 1099404000 is 4049901.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20731 + ... + 51269.

It is an arithmetic number, because the mean of its divisors is an integer number (27096615).

Almost surely, 2^1099404000 is an apocalyptic number.

1099404000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1099404000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1950956280).

1099404000 is an abundant number, since it is smaller than the sum of its proper divisors (2802508560).

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

1099404000 is a wasteful number, since it uses less digits than its factorization.

1099404000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30570 (or 30549 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 1099404000 is about 33157.2616480915. The cubic root of 1099404000 is about 1032.0936457297.

The spelling of 1099404000 in words is "one billion, ninety-nine million, four hundred four thousand".