28647423 has 12 divisors (see below), whose sum is σ = 47291088. Its totient is φ = 16369920.

The previous prime is 28647419. The next prime is 28647427. The reversal of 28647423 is 32474682.

28647423 is a `hidden beast` number, since 2 + 8 + 647 + 4 + 2 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (28647419) and next prime (28647427).

It is not a de Polignac number, because 28647423 - 2² = 28647419 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28647427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 227298 + ... + 227423.

It is an arithmetic number, because the mean of its divisors is an integer number (3940924).

Almost surely, 2^28647423 is an apocalyptic number.

28647423 is a deficient number, since it is larger than the sum of its proper divisors (18643665).

28647423 is a wasteful number, since it uses less digits than its factorization.

28647423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454734 (or 454731 counting only the distinct ones).

The product of its digits is 64512, while the sum is 36.

The square root of 28647423 is about 5352.3287455088. The cubic root of 28647423 is about 305.9815124035.

The spelling of 28647423 in words is "twenty-eight million, six hundred forty-seven thousand, four hundred twenty-three".