28654281 has 6 divisors (see below), whose sum is σ = 41389530. Its totient is φ = 19102848.

The previous prime is 28654267. The next prime is 28654289. The reversal of 28654281 is 18245682.

It can be written as a sum of positive squares in only one way, i.e., 24206400 + 4447881 = 4920^2 + 2109^2 .

It is not a de Polignac number, because 28654281 - 2⁶ = 28654217 is a prime.

It is a super-2 number, since 2×28654281² = 1642135639253922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28654289) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1591896 + ... + 1591913.

It is an arithmetic number, because the mean of its divisors is an integer number (6898255).

Almost surely, 2^28654281 is an apocalyptic number.

It is an amenable number.

28654281 is a deficient number, since it is larger than the sum of its proper divisors (12735249).

28654281 is a wasteful number, since it uses less digits than its factorization.

28654281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3183815 (or 3183812 counting only the distinct ones).

The product of its digits is 30720, while the sum is 36.

The square root of 28654281 is about 5352.9693628864. The cubic root of 28654281 is about 306.0059270927.

The spelling of 28654281 in words is "twenty-eight million, six hundred fifty-four thousand, two hundred eighty-one".