11428663 has 4 divisors (see below), whose sum is σ = 11451888. Its totient is φ = 11405440.

The previous prime is 11428649. The next prime is 11428667. The reversal of 11428663 is 36682411.

It is a happy number.

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 11428663 - 2¹³ = 11420471 is a prime.

It is a super-2 number, since 2×11428663² = 261228675935138, 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, 10858 + ... + 11863.

It is an arithmetic number, because the mean of its divisors is an integer number (2862972).

Almost surely, 2^11428663 is an apocalyptic number.

11428663 is a deficient number, since it is larger than the sum of its proper divisors (23225).

11428663 is an equidigital number, since it uses as much as digits as its factorization.

11428663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23224.

The product of its digits is 6912, while the sum is 31.

The square root of 11428663 is about 3380.6305624839. The cubic root of 11428663 is about 225.2501776912.

The spelling of 11428663 in words is "eleven million, four hundred twenty-eight thousand, six hundred sixty-three".