28255419 has 8 divisors (see below), whose sum is σ = 41859920. Its totient is φ = 18836928.

The previous prime is 28255417. The next prime is 28255427. The reversal of 28255419 is 91455282.

It is not a de Polignac number, because 28255419 - 2¹ = 28255417 is a prime.

It is a super-2 number, since 2×28255419² = 1596737405731122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28255417) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 523222 + ... + 523275.

It is an arithmetic number, because the mean of its divisors is an integer number (5232490).

Almost surely, 2^28255419 is an apocalyptic number.

28255419 is a deficient number, since it is larger than the sum of its proper divisors (13604501).

28255419 is a wasteful number, since it uses less digits than its factorization.

28255419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1046506 (or 1046500 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 28255419 is about 5315.5826585615. The cubic root of 28255419 is about 304.5794400707.

The spelling of 28255419 in words is "twenty-eight million, two hundred fifty-five thousand, four hundred nineteen".