28451807 has 2 divisors, whose sum is σ = 28451808. Its totient is φ = 28451806.

The previous prime is 28451791. The next prime is 28451809. The reversal of 28451807 is 70815482.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28451807 - 2⁴ = 28451791 is a prime.

Together with 28451809, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28451809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14225903 + 14225904.

It is an arithmetic number, because the mean of its divisors is an integer number (14225904).

Almost surely, 2^28451807 is an apocalyptic number.

28451807 is a deficient number, since it is larger than the sum of its proper divisors (1).

28451807 is an equidigital number, since it uses as much as digits as its factorization.

28451807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17920, while the sum is 35.

The square root of 28451807 is about 5334.0235282571. The cubic root of 28451807 is about 305.2834666449.

The spelling of 28451807 in words is "twenty-eight million, four hundred fifty-one thousand, eight hundred seven".