28975398 has 16 divisors (see below), whose sum is σ = 58003776. Its totient is φ = 9649640.

The previous prime is 28975391. The next prime is 28975411. The reversal of 28975398 is 89357982.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28975398.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28975391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10813 + ... + 13223.

It is an arithmetic number, because the mean of its divisors is an integer number (3625236).

Almost surely, 2^28975398 is an apocalyptic number.

28975398 is an abundant number, since it is smaller than the sum of its proper divisors (29028378).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28975398 is a wasteful number, since it uses less digits than its factorization.

28975398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4419.

The product of its digits is 1088640, while the sum is 51.

The square root of 28975398 is about 5382.8800841185. The cubic root of 28975398 is about 307.1447785195.

The spelling of 28975398 in words is "twenty-eight million, nine hundred seventy-five thousand, three hundred ninety-eight".