28038258 has 16 divisors (see below), whose sum is σ = 62307360. Its totient is φ = 9346068.

The previous prime is 28038251. The next prime is 28038271. The reversal of 28038258 is 85283082.

It is a super-2 number, since 2×28038258² = 1572287823349128, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28038251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 259560 + ... + 259667.

It is an arithmetic number, because the mean of its divisors is an integer number (3894210).

Almost surely, 2^28038258 is an apocalyptic number.

28038258 is an abundant number, since it is smaller than the sum of its proper divisors (34269102).

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

28038258 is a wasteful number, since it uses less digits than its factorization.

28038258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519238 (or 519232 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 28038258 is about 5295.1164293148. The cubic root of 28038258 is about 303.7971364130.

The spelling of 28038258 in words is "twenty-eight million, thirty-eight thousand, two hundred fifty-eight".