28338258 has 24 divisors (see below), whose sum is σ = 61373808. Its totient is φ = 8719152.

The previous prime is 28338251. The next prime is 28338281. The reversal of 28338258 is 85283382.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (28338251) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12960 + ... + 14987.

It is an arithmetic number, because the mean of its divisors is an integer number (2557242).

Almost surely, 2^28338258 is an apocalyptic number.

28338258 is an abundant number, since it is smaller than the sum of its proper divisors (33035550).

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

28338258 is a wasteful number, since it uses less digits than its factorization.

28338258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27978 (or 27965 counting only the distinct ones).

The product of its digits is 92160, while the sum is 39.

The square root of 28338258 is about 5323.3690460084. The cubic root of 28338258 is about 304.8768041376.

The spelling of 28338258 in words is "twenty-eight million, three hundred thirty-eight thousand, two hundred fifty-eight".