28889937 has 24 divisors (see below), whose sum is σ = 44959200. Its totient is φ = 17817408.

The previous prime is 28889921. The next prime is 28889951. The reversal of 28889937 is 73998882.

It is not a de Polignac number, because 28889937 - 2⁴ = 28889921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28882937) 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 23 ways as a sum of consecutive naturals, for example, 5389 + ... + 9317.

It is an arithmetic number, because the mean of its divisors is an integer number (1873300).

Almost surely, 2^28889937 is an apocalyptic number.

It is an amenable number.

28889937 is a deficient number, since it is larger than the sum of its proper divisors (16069263).

28889937 is a wasteful number, since it uses less digits than its factorization.

28889937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3997 (or 3994 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 54.

The square root of 28889937 is about 5374.9359996190. The cubic root of 28889937 is about 306.8425134883.

The spelling of 28889937 in words is "twenty-eight million, eight hundred eighty-nine thousand, nine hundred thirty-seven".