28451567 has 2 divisors, whose sum is σ = 28451568. Its totient is φ = 28451566.

The previous prime is 28451539. The next prime is 28451593. The reversal of 28451567 is 76515482.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28451567 - 2⁶ = 28451503 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28451567.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28451597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14225783 + 14225784.

It is an arithmetic number, because the mean of its divisors is an integer number (14225784).

Almost surely, 2^28451567 is an apocalyptic number.

28451567 is a deficient number, since it is larger than the sum of its proper divisors (1).

28451567 is an equidigital number, since it uses as much as digits as its factorization.

28451567 is an evil number, because the sum of its binary digits is even.

The product of its digits is 67200, while the sum is 38.

The square root of 28451567 is about 5334.0010311210. The cubic root of 28451567 is about 305.2826082549.

The spelling of 28451567 in words is "twenty-eight million, four hundred fifty-one thousand, five hundred sixty-seven".