28909053 has 6 divisors (see below), whose sum is σ = 41757534. Its totient is φ = 19272696.

The previous prime is 28909043. The next prime is 28909057. The reversal of 28909053 is 35090982.

It can be written as a sum of positive squares in only one way, i.e., 19342404 + 9566649 = 4398^2 + 3093^2 .

It is not a de Polignac number, because 28909053 - 2⁵ = 28909021 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28908999 and 28909017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28909057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1606050 + ... + 1606067.

It is an arithmetic number, because the mean of its divisors is an integer number (6959589).

Almost surely, 2^28909053 is an apocalyptic number.

It is an amenable number.

28909053 is a deficient number, since it is larger than the sum of its proper divisors (12848481).

28909053 is a wasteful number, since it uses less digits than its factorization.

28909053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3212123 (or 3212120 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 28909053 is about 5376.7139592878. The cubic root of 28909053 is about 306.9101761285.

The spelling of 28909053 in words is "twenty-eight million, nine hundred nine thousand, fifty-three".