28264023 has 6 divisors (see below), whose sum is σ = 40825824. Its totient is φ = 18842676.

The previous prime is 28264021. The next prime is 28264031. The reversal of 28264023 is 32046282.

It is not a de Polignac number, because 28264023 - 2¹ = 28264021 is a prime.

It is a super-2 number, since 2×28264023² = 1597709992289058, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28264021) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1570215 + ... + 1570232.

It is an arithmetic number, because the mean of its divisors is an integer number (6804304).

Almost surely, 2^28264023 is an apocalyptic number.

28264023 is a deficient number, since it is larger than the sum of its proper divisors (12561801).

28264023 is a wasteful number, since it uses less digits than its factorization.

28264023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3140453 (or 3140450 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 28264023 is about 5316.3919155758. The cubic root of 28264023 is about 304.6103525546.

The spelling of 28264023 in words is "twenty-eight million, two hundred sixty-four thousand, twenty-three".