28451887 has 2 divisors, whose sum is σ = 28451888. Its totient is φ = 28451886.

The previous prime is 28451881. The next prime is 28451903. The reversal of 28451887 is 78815482.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28451887 - 2³ = 28451879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28451881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14225943 + 14225944.

It is an arithmetic number, because the mean of its divisors is an integer number (14225944).

Almost surely, 2^28451887 is an apocalyptic number.

28451887 is a deficient number, since it is larger than the sum of its proper divisors (1).

28451887 is an equidigital number, since it uses as much as digits as its factorization.

28451887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 143360, while the sum is 43.

The square root of 28451887 is about 5334.0310272813. The cubic root of 28451887 is about 305.2837527738.

The spelling of 28451887 in words is "twenty-eight million, four hundred fifty-one thousand, eight hundred eighty-seven".