28623851 has 2 divisors, whose sum is σ = 28623852. Its totient is φ = 28623850.

The previous prime is 28623839. The next prime is 28623857. The reversal of 28623851 is 15832682.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28623851 is a prime.

It is not a weakly prime, because it can be changed into another prime (28623857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14311925 + 14311926.

It is an arithmetic number, because the mean of its divisors is an integer number (14311926).

Almost surely, 2^28623851 is an apocalyptic number.

28623851 is a deficient number, since it is larger than the sum of its proper divisors (1).

28623851 is an equidigital number, since it uses as much as digits as its factorization.

28623851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23040, while the sum is 35.

The square root of 28623851 is about 5350.1262601924. The cubic root of 28623851 is about 305.8975656396.

The spelling of 28623851 in words is "twenty-eight million, six hundred twenty-three thousand, eight hundred fifty-one".