28477923 has 8 divisors (see below), whose sum is σ = 38226000. Its totient is φ = 18857568.

The previous prime is 28477919. The next prime is 28477927. The reversal of 28477923 is 32977482.

It is an interprime number because it is at equal distance from previous prime (28477919) and next prime (28477927).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28477923 - 2² = 28477919 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (28477927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31408 + ... + 32301.

It is an arithmetic number, because the mean of its divisors is an integer number (4778250).

Almost surely, 2^28477923 is an apocalyptic number.

28477923 is a deficient number, since it is larger than the sum of its proper divisors (9748077).

28477923 is a wasteful number, since it uses less digits than its factorization.

28477923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63861.

The product of its digits is 169344, while the sum is 42.

The square root of 28477923 is about 5336.4710249377. The cubic root of 28477923 is about 305.3768449535.

The spelling of 28477923 in words is "twenty-eight million, four hundred seventy-seven thousand, nine hundred twenty-three".