1099902720 has 576 divisors, whose sum is σ = 4450360320. Its totient is φ = 225705984.

The previous prime is 1099902709. The next prime is 1099902743. The reversal of 1099902720 is 272099901.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 13251799 + ... + 13251881.

It is an arithmetic number, because the mean of its divisors is an integer number (7726320).

Almost surely, 2^1099902720 is an apocalyptic number.

1099902720 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 1099902720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2225180160).

1099902720 is an abundant number, since it is smaller than the sum of its proper divisors (3350457600).

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

1099902720 is a wasteful number, since it uses less digits than its factorization.

1099902720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160 (or 146 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 39.

The square root of 1099902720 is about 33164.7813199484. The cubic root of 1099902720 is about 1032.2496841927.

The spelling of 1099902720 in words is "one billion, ninety-nine million, nine hundred two thousand, seven hundred twenty".