11728887 has 8 divisors (see below), whose sum is σ = 15671280. Its totient is φ = 7802880.

The previous prime is 11728883. The next prime is 11728891. The reversal of 11728887 is 78882711.

It is an interprime number because it is at equal distance from previous prime (11728883) and next prime (11728891).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11728887 - 2² = 11728883 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11728883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2314 + ... + 5367.

It is an arithmetic number, because the mean of its divisors is an integer number (1958910).

Almost surely, 2^11728887 is an apocalyptic number.

11728887 is a deficient number, since it is larger than the sum of its proper divisors (3942393).

11728887 is an equidigital number, since it uses as much as digits as its factorization.

11728887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8193.

The product of its digits is 50176, while the sum is 42.

The square root of 11728887 is about 3424.7462679737. The cubic root of 11728887 is about 227.2055491003.

The spelling of 11728887 in words is "eleven million, seven hundred twenty-eight thousand, eight hundred eighty-seven".