28549902 has 32 divisors (see below), whose sum is σ = 61018272. Its totient is φ = 8873984.

The previous prime is 28549901. The next prime is 28549907. The reversal of 28549902 is 20994582.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28549901) 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 15 ways as a sum of consecutive naturals, for example, 10288 + ... + 12764.

It is an arithmetic number, because the mean of its divisors is an integer number (1906821).

Almost surely, 2^28549902 is an apocalyptic number.

28549902 is an abundant number, since it is smaller than the sum of its proper divisors (32468370).

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

28549902 is a wasteful number, since it uses less digits than its factorization.

28549902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2612.

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 28549902 is about 5343.2108324490. The cubic root of 28549902 is about 305.6339122363.

The spelling of 28549902 in words is "twenty-eight million, five hundred forty-nine thousand, nine hundred two".