28640254 has 16 divisors (see below), whose sum is σ = 43547328. Its totient is φ = 14126112.

The previous prime is 28640243. The next prime is 28640273. The reversal of 28640254 is 45204682.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61627 + ... + 62089.

It is an arithmetic number, because the mean of its divisors is an integer number (2721708).

Almost surely, 2^28640254 is an apocalyptic number.

28640254 is a deficient number, since it is larger than the sum of its proper divisors (14907074).

28640254 is a wasteful number, since it uses less digits than its factorization.

28640254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 819.

The product of its (nonzero) digits is 15360, while the sum is 31.

The square root of 28640254 is about 5351.6589951154. The cubic root of 28640254 is about 305.9559863789.

The spelling of 28640254 in words is "twenty-eight million, six hundred forty thousand, two hundred fifty-four".