28959489 has 24 divisors (see below), whose sum is σ = 46154472. Its totient is φ = 17383680.

The previous prime is 28959481. The next prime is 28959499. The reversal of 28959489 is 98495982.

It can be written as a sum of positive squares in 4 ways, for example, as 1742400 + 27217089 = 1320^2 + 5217^2 .

It is not a de Polignac number, because 28959489 - 2³ = 28959481 is a prime.

It is a super-2 number, since 2×28959489² = 1677304006282242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28959481) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1779 + ... + 7815.

It is an arithmetic number, because the mean of its divisors is an integer number (1923103).

Almost surely, 2^28959489 is an apocalyptic number.

It is an amenable number.

28959489 is a deficient number, since it is larger than the sum of its proper divisors (17194983).

28959489 is a wasteful number, since it uses less digits than its factorization.

28959489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6097 (or 6094 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 54.

The square root of 28959489 is about 5381.4021407065. The cubic root of 28959489 is about 307.0885554109.

The spelling of 28959489 in words is "twenty-eight million, nine hundred fifty-nine thousand, four hundred eighty-nine".