28142623 has 2 divisors, whose sum is σ = 28142624. Its totient is φ = 28142622.

The previous prime is 28142579. The next prime is 28142641. The reversal of 28142623 is 32624182.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28142623 - 2⁹ = 28142111 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28142591 and 28142600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28142663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14071311 + 14071312.

It is an arithmetic number, because the mean of its divisors is an integer number (14071312).

Almost surely, 2^28142623 is an apocalyptic number.

28142623 is a deficient number, since it is larger than the sum of its proper divisors (1).

28142623 is an equidigital number, since it uses as much as digits as its factorization.

28142623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4608, while the sum is 28.

The square root of 28142623 is about 5304.9621110805. The cubic root of 28142623 is about 304.1736045289.

The spelling of 28142623 in words is "twenty-eight million, one hundred forty-two thousand, six hundred twenty-three".