28230069 has 16 divisors (see below), whose sum is σ = 43130880. Its totient is φ = 16088880.

The previous prime is 28230061. The next prime is 28230071. The reversal of 28230069 is 96003282.

28230069 = T₉₁₅ + T₉₁₆ + ... + T₉₇₇.

It is not a de Polignac number, because 28230069 - 2³ = 28230061 is a prime.

It is a super-2 number, since 2×28230069² = 1593873591489522, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28230061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7492 + ... + 10610.

It is an arithmetic number, because the mean of its divisors is an integer number (2695680).

Almost surely, 2^28230069 is an apocalyptic number.

It is an amenable number.

28230069 is a deficient number, since it is larger than the sum of its proper divisors (14900811).

28230069 is a wasteful number, since it uses less digits than its factorization.

28230069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3560.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 28230069 is about 5313.1976247830. The cubic root of 28230069 is about 304.4883259968.

The spelling of 28230069 in words is "twenty-eight million, two hundred thirty thousand, sixty-nine".