28089466 has 4 divisors (see below), whose sum is σ = 42134202. Its totient is φ = 14044732.

The previous prime is 28089461. The next prime is 28089493. The reversal of 28089466 is 66498082.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 28037025 + 52441 = 5295^2 + 229^2 .

It is not an unprimeable number, because it can be changed into a prime (28089461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7022365 + ... + 7022368.

Almost surely, 2^28089466 is an apocalyptic number.

28089466 is a deficient number, since it is larger than the sum of its proper divisors (14044736).

28089466 is a wasteful number, since it uses less digits than its factorization.

28089466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14044735.

The product of its (nonzero) digits is 165888, while the sum is 43.

The square root of 28089466 is about 5299.9496224021. The cubic root of 28089466 is about 303.9819717494.

The spelling of 28089466 in words is "twenty-eight million, eighty-nine thousand, four hundred sixty-six".