10899840 has 128 divisors (see below), whose sum is σ = 39755520. Its totient is φ = 2488320.

The previous prime is 10899829. The next prime is 10899869. The reversal of 10899840 is 4899801.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13035 + ... + 13845.

It is an arithmetic number, because the mean of its divisors is an integer number (310590).

Almost surely, 2^10899840 is an apocalyptic number.

10899840 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 10899840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19877760).

10899840 is an abundant number, since it is smaller than the sum of its proper divisors (28855680).

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

10899840 is an equidigital number, since it uses as much as digits as its factorization.

10899840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 840 (or 828 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 39.

The square root of 10899840 is about 3301.4905724536. The cubic root of 10899840 is about 221.7209382130.

Subtracting from 10899840 its sum of digits (39), we obtain a palindrome (10899801).

The spelling of 10899840 in words is "ten million, eight hundred ninety-nine thousand, eight hundred forty".