28714911 has 4 divisors (see below), whose sum is σ = 38286552. Its totient is φ = 19143272.

The previous prime is 28714859. The next prime is 28714913. The reversal of 28714911 is 11941782.

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 28714911 - 2⁷ = 28714783 is a prime.

It is a super-2 number, since 2×28714911² = 1649092227475842, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28714913) 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, 4785816 + ... + 4785821.

It is an arithmetic number, because the mean of its divisors is an integer number (9571638).

Almost surely, 2^28714911 is an apocalyptic number.

28714911 is a deficient number, since it is larger than the sum of its proper divisors (9571641).

28714911 is an equidigital number, since it uses as much as digits as its factorization.

28714911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9571640.

The product of its digits is 4032, while the sum is 33.

The square root of 28714911 is about 5358.6295822719. The cubic root of 28714911 is about 306.2216024759.

The spelling of 28714911 in words is "twenty-eight million, seven hundred fourteen thousand, nine hundred eleven".