28569466 has 16 divisors (see below), whose sum is σ = 44780040. Its totient is φ = 13652800.

The previous prime is 28569461. The next prime is 28569479. The reversal of 28569466 is 66496582.

It can be written as a sum of positive squares in 4 ways, for example, as 27405225 + 1164241 = 5235^2 + 1079^2 .

It is not an unprimeable number, because it can be changed into a prime (28569461) 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, 3420 + ... + 8296.

Almost surely, 2^28569466 is an apocalyptic number.

28569466 is a deficient number, since it is larger than the sum of its proper divisors (16210574).

28569466 is a wasteful number, since it uses less digits than its factorization.

28569466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5009.

The product of its digits is 622080, while the sum is 46.

The square root of 28569466 is about 5345.0412533488. The cubic root of 28569466 is about 305.7037088164.

It can be divided in two parts, 285 and 69466, that added together give a triangular number (69751 = T₃₇₃).

The spelling of 28569466 in words is "twenty-eight million, five hundred sixty-nine thousand, four hundred sixty-six".