28465919 has 2 divisors, whose sum is σ = 28465920. Its totient is φ = 28465918.

The previous prime is 28465903. The next prime is 28465937. The reversal of 28465919 is 91956482.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28465919 - 2⁴ = 28465903 is a prime.

It is a super-2 number, since 2×28465919² = 1620617089029122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28465919.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28465979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14232959 + 14232960.

It is an arithmetic number, because the mean of its divisors is an integer number (14232960).

Almost surely, 2^28465919 is an apocalyptic number.

28465919 is a deficient number, since it is larger than the sum of its proper divisors (1).

28465919 is an equidigital number, since it uses as much as digits as its factorization.

28465919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 44.

The square root of 28465919 is about 5335.3461930788. The cubic root of 28465919 is about 305.3339314912. Note that the first 3 decimals are identical.

The spelling of 28465919 in words is "twenty-eight million, four hundred sixty-five thousand, nine hundred nineteen".