11428687 has 4 divisors (see below), whose sum is σ = 11457040. Its totient is φ = 11400336.

The previous prime is 11428673. The next prime is 11428699. The reversal of 11428687 is 78682411.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11428687 - 2⁷ = 11428559 is a prime.

It is a super-2 number, since 2×11428687² = 261229773087938, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11428667) 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, 13563 + ... + 14380.

It is an arithmetic number, because the mean of its divisors is an integer number (2864260).

Almost surely, 2^11428687 is an apocalyptic number.

11428687 is a deficient number, since it is larger than the sum of its proper divisors (28353).

11428687 is an equidigital number, since it uses as much as digits as its factorization.

11428687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28352.

The product of its digits is 21504, while the sum is 37.

The square root of 11428687 is about 3380.6341121157. The cubic root of 11428687 is about 225.2503353649.

The spelling of 11428687 in words is "eleven million, four hundred twenty-eight thousand, six hundred eighty-seven".