28023011 has 2 divisors, whose sum is σ = 28023012. Its totient is φ = 28023010.

The previous prime is 28023007. The next prime is 28023029. The reversal of 28023011 is 11032082.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28023011 - 2² = 28023007 is a prime.

It is a super-2 number, since 2×28023011² = 1570578291012242, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28023001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14011505 + 14011506.

It is an arithmetic number, because the mean of its divisors is an integer number (14011506).

Almost surely, 2^28023011 is an apocalyptic number.

28023011 is a deficient number, since it is larger than the sum of its proper divisors (1).

28023011 is an equidigital number, since it uses as much as digits as its factorization.

28023011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 28023011 is about 5293.6765107060. The cubic root of 28023011 is about 303.7420588733.

Adding to 28023011 its reverse (11032082), we get a palindrome (39055093).

The spelling of 28023011 in words is "twenty-eight million, twenty-three thousand, eleven".