1099399392 has 480 divisors, whose sum is σ = 4098124800. Its totient is φ = 281428992.

The previous prime is 1099399351. The next prime is 1099399393. The reversal of 1099399392 is 2939939901.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1099399393) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 13916409 + ... + 13916487.

It is an arithmetic number, because the mean of its divisors is an integer number (8537760).

Almost surely, 2^1099399392 is an apocalyptic number.

1099399392 is a gapful number since it is divisible by the number (12) 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 1099399392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2049062400).

1099399392 is an abundant number, since it is smaller than the sum of its proper divisors (2998725408).

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

1099399392 is a wasteful number, since it uses less digits than its factorization.

1099399392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180 (or 163 counting only the distinct ones).

The product of its (nonzero) digits is 1062882, while the sum is 54.

The square root of 1099399392 is about 33157.1921609777. The cubic root of 1099399392 is about 1032.0922037683.

The spelling of 1099399392 in words is "one billion, ninety-nine million, three hundred ninety-nine thousand, three hundred ninety-two".