28238158 has 16 divisors (see below), whose sum is σ = 47599776. Its totient is φ = 12466080.

The previous prime is 28238129. The next prime is 28238183. The reversal of 28238158 is 85183282.

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, 23013 + ... + 24208.

It is an arithmetic number, because the mean of its divisors is an integer number (2974986).

Almost surely, 2^28238158 is an apocalyptic number.

28238158 is a deficient number, since it is larger than the sum of its proper divisors (19361618).

28238158 is a wasteful number, since it uses less digits than its factorization.

28238158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47259.

The product of its digits is 30720, while the sum is 37.

The square root of 28238158 is about 5313.9587879471. The cubic root of 28238158 is about 304.5174057563.

The spelling of 28238158 in words is "twenty-eight million, two hundred thirty-eight thousand, one hundred fifty-eight".