28490208 has 24 divisors (see below), whose sum is σ = 74787048. Its totient is φ = 9496704.

The previous prime is 28490207. The next prime is 28490239. The reversal of 28490208 is 80209482.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28490201) 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 3 ways as a sum of consecutive naturals, for example, 148291 + ... + 148482.

It is an arithmetic number, because the mean of its divisors is an integer number (3116127).

Almost surely, 2^28490208 is an apocalyptic number.

It is an amenable number.

28490208 is an abundant number, since it is smaller than the sum of its proper divisors (46296840).

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

28490208 is a wasteful number, since it uses less digits than its factorization.

28490208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296786 (or 296778 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 28490208 is about 5337.6219424009. The cubic root of 28490208 is about 305.4207504871.

The spelling of 28490208 in words is "twenty-eight million, four hundred ninety thousand, two hundred eight".