28533069 has 6 divisors (see below), whose sum is σ = 41214446. Its totient is φ = 19022040.

The previous prime is 28533061. The next prime is 28533077. The reversal of 28533069 is 96033582.

It is an interprime number because it is at equal distance from previous prime (28533061) and next prime (28533077).

It can be written as a sum of positive squares in only one way, i.e., 27405225 + 1127844 = 5235^2 + 1062^2 .

It is not a de Polignac number, because 28533069 - 2³ = 28533061 is a prime.

It is a super-2 number, since 2×28533069² = 1628272053117522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28533061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1585162 + ... + 1585179.

Almost surely, 2^28533069 is an apocalyptic number.

It is an amenable number.

28533069 is a deficient number, since it is larger than the sum of its proper divisors (12681377).

28533069 is a wasteful number, since it uses less digits than its factorization.

28533069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3170347 (or 3170344 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 28533069 is about 5341.6354237256. The cubic root of 28533069 is about 305.5738332550.

The spelling of 28533069 in words is "twenty-eight million, five hundred thirty-three thousand, sixty-nine".