28414281 has 16 divisors (see below), whose sum is σ = 43545600. Its totient is φ = 16143888.

The previous prime is 28414279. The next prime is 28414297. The reversal of 28414281 is 18241482.

It is not a de Polignac number, because 28414281 - 2¹ = 28414279 is a prime.

It is a super-2 number, since 2×28414281² = 1614742729493922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28414081) 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 in 15 ways as a sum of consecutive naturals, for example, 21 + ... + 7538.

It is an arithmetic number, because the mean of its divisors is an integer number (2721600).

Almost surely, 2^28414281 is an apocalyptic number.

28414281 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

28414281 is a deficient number, since it is larger than the sum of its proper divisors (15131319).

28414281 is a wasteful number, since it uses less digits than its factorization.

28414281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7748.

The product of its digits is 4096, while the sum is 30.

The square root of 28414281 is about 5330.5047603393. The cubic root of 28414281 is about 305.1491915453.

The spelling of 28414281 in words is "twenty-eight million, four hundred fourteen thousand, two hundred eighty-one".