11899728 has 60 divisors (see below), whose sum is σ = 35268948. Its totient is φ = 3732480.

The previous prime is 11899721. The next prime is 11899729. The reversal of 11899728 is 82799811.

It can be written as a sum of positive squares in 2 ways, for example, as 10188864 + 1710864 = 3192^2 + 1308^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11899721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18 + ... + 4878.

Almost surely, 2^11899728 is an apocalyptic number.

11899728 is a gapful number since it is divisible by the number (18) 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 11899728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17634474).

11899728 is an abundant number, since it is smaller than the sum of its proper divisors (23369220).

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

11899728 is a wasteful number, since it uses less digits than its factorization.

11899728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4892 (or 4883 counting only the distinct ones).

The product of its digits is 72576, while the sum is 45.

The square root of 11899728 is about 3449.5982374764. The cubic root of 11899728 is about 228.3033819144.

It can be divided in two parts, 118997 and 28, that added together give a square (119025 = 345²).

The spelling of 11899728 in words is "eleven million, eight hundred ninety-nine thousand, seven hundred twenty-eight".