11728840 has 16 divisors (see below), whose sum is σ = 26389980. Its totient is φ = 4691520.

The previous prime is 11728817. The next prime is 11728841. The reversal of 11728840 is 4882711.

It can be written as a sum of positive squares in 2 ways, for example, as 11573604 + 155236 = 3402^2 + 394^2 .

It is not an unprimeable number, because it can be changed into a prime (11728841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146571 + ... + 146650.

Almost surely, 2^11728840 is an apocalyptic number.

11728840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11728840 is an abundant number, since it is smaller than the sum of its proper divisors (14661140).

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

11728840 is a wasteful number, since it uses less digits than its factorization.

11728840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293232 (or 293228 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 31.

The square root of 11728840 is about 3424.7394061446. The cubic root of 11728840 is about 227.2052456139.

The spelling of 11728840 in words is "eleven million, seven hundred twenty-eight thousand, eight hundred forty".