28049889 has 16 divisors (see below), whose sum is σ = 43738112. Its totient is φ = 15655248.

The previous prime is 28049867. The next prime is 28049891. The reversal of 28049889 is 98894082.

It is not a de Polignac number, because 28049889 - 2⁸ = 28049633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28049809) 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, 14629 + ... + 16434.

It is an arithmetic number, because the mean of its divisors is an integer number (2733632).

Almost surely, 2^28049889 is an apocalyptic number.

It is an amenable number.

28049889 is a deficient number, since it is larger than the sum of its proper divisors (15688223).

28049889 is a wasteful number, since it uses less digits than its factorization.

28049889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31116.

The product of its (nonzero) digits is 331776, while the sum is 48.

The square root of 28049889 is about 5296.2145915739. The cubic root of 28049889 is about 303.8391382618.

The spelling of 28049889 in words is "twenty-eight million, forty-nine thousand, eight hundred eighty-nine".