28657023 has 4 divisors (see below), whose sum is σ = 38209368. Its totient is φ = 19104680.

The previous prime is 28657009. The next prime is 28657037. The reversal of 28657023 is 32075682.

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

It is an interprime number because it is at equal distance from previous prime (28657009) and next prime (28657037).

It is a cyclic number.

It is not a de Polignac number, because 28657023 - 2¹³ = 28648831 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28657003) 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, 4776168 + ... + 4776173.

It is an arithmetic number, because the mean of its divisors is an integer number (9552342).

Almost surely, 2^28657023 is an apocalyptic number.

28657023 is a deficient number, since it is larger than the sum of its proper divisors (9552345).

28657023 is an equidigital number, since it uses as much as digits as its factorization.

28657023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9552344.

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 28657023 is about 5353.2254762900. The cubic root of 28657023 is about 306.0156876062.

The spelling of 28657023 in words is "twenty-eight million, six hundred fifty-seven thousand, twenty-three".