28049238 has 24 divisors (see below), whose sum is σ = 69455568. Its totient is φ = 8014032.

The previous prime is 28049221. The next prime is 28049257. The reversal of 28049238 is 83294082.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 111181 + ... + 111432.

It is an arithmetic number, because the mean of its divisors is an integer number (2893982).

Almost surely, 2^28049238 is an apocalyptic number.

28049238 is an abundant number, since it is smaller than the sum of its proper divisors (41406330).

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

28049238 is a wasteful number, since it uses less digits than its factorization.

28049238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222628 (or 222625 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 28049238 is about 5296.1531322272. The cubic root of 28049238 is about 303.8367876784.

The spelling of 28049238 in words is "twenty-eight million, forty-nine thousand, two hundred thirty-eight".