28451399 has 2 divisors, whose sum is σ = 28451400. Its totient is φ = 28451398.

The previous prime is 28451369. The next prime is 28451411. The reversal of 28451399 is 99315482.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28451399 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28451359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14225699 + 14225700.

It is an arithmetic number, because the mean of its divisors is an integer number (14225700).

Almost surely, 2^28451399 is an apocalyptic number.

28451399 is a deficient number, since it is larger than the sum of its proper divisors (1).

28451399 is an equidigital number, since it uses as much as digits as its factorization.

28451399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 41.

The square root of 28451399 is about 5333.9852830693. The cubic root of 28451399 is about 305.2820073790.

The spelling of 28451399 in words is "twenty-eight million, four hundred fifty-one thousand, three hundred ninety-nine".