28669711 has 4 divisors (see below), whose sum is σ = 32765392. Its totient is φ = 24574032.

The previous prime is 28669703. The next prime is 28669717. The reversal of 28669711 is 11796682.

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

It is not a de Polignac number, because 28669711 - 2³ = 28669703 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28669717) 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, 2047830 + ... + 2047843.

It is an arithmetic number, because the mean of its divisors is an integer number (8191348).

Almost surely, 2^28669711 is an apocalyptic number.

28669711 is a deficient number, since it is larger than the sum of its proper divisors (4095681).

28669711 is an equidigital number, since it uses as much as digits as its factorization.

28669711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4095680.

The product of its digits is 36288, while the sum is 40.

The square root of 28669711 is about 5354.4104250608. The cubic root of 28669711 is about 306.0608441245.

The spelling of 28669711 in words is "twenty-eight million, six hundred sixty-nine thousand, seven hundred eleven".