28927969 has 16 divisors (see below), whose sum is σ = 34529536. Its totient is φ = 23716800.

The previous prime is 28927957. The next prime is 28927973. The reversal of 28927969 is 96972982.

It is not a de Polignac number, because 28927969 - 2¹¹ = 28925921 is a prime.

It is a super-2 number, since 2×28927969² = 1673654780929922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28927939) 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, 14884 + ... + 16714.

It is an arithmetic number, because the mean of its divisors is an integer number (2158096).

Almost surely, 2^28927969 is an apocalyptic number.

It is an amenable number.

28927969 is a deficient number, since it is larger than the sum of its proper divisors (5601567).

28927969 is a wasteful number, since it uses less digits than its factorization.

28927969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1936.

The product of its digits is 979776, while the sum is 52.

The square root of 28927969 is about 5378.4727386127. The cubic root of 28927969 is about 306.9771014974.

The spelling of 28927969 in words is "twenty-eight million, nine hundred twenty-seven thousand, nine hundred sixty-nine".