28023477 has 4 divisors (see below), whose sum is σ = 37364640. Its totient is φ = 18682316.

The previous prime is 28023469. The next prime is 28023481. The reversal of 28023477 is 77432082.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28023477 - 2³ = 28023469 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28023577) 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, 4670577 + ... + 4670582.

It is an arithmetic number, because the mean of its divisors is an integer number (9341160).

Almost surely, 2^28023477 is an apocalyptic number.

It is an amenable number.

28023477 is a deficient number, since it is larger than the sum of its proper divisors (9341163).

28023477 is an equidigital number, since it uses as much as digits as its factorization.

28023477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9341162.

The product of its (nonzero) digits is 18816, while the sum is 33.

The square root of 28023477 is about 5293.7205253017. The cubic root of 28023477 is about 303.7437425255.

The spelling of 28023477 in words is "twenty-eight million, twenty-three thousand, four hundred seventy-seven".