28905358 has 4 divisors (see below), whose sum is σ = 43358040. Its totient is φ = 14452678.

The previous prime is 28905353. The next prime is 28905379. The reversal of 28905358 is 85350982.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×28905358² = 1671039442216328, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 28905358.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28905353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7226338 + ... + 7226341.

It is an arithmetic number, because the mean of its divisors is an integer number (10839510).

Almost surely, 2^28905358 is an apocalyptic number.

28905358 is a deficient number, since it is larger than the sum of its proper divisors (14452682).

28905358 is a wasteful number, since it uses less digits than its factorization.

28905358 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14452681.

The product of its (nonzero) digits is 86400, while the sum is 40.

The square root of 28905358 is about 5376.3703369467. The cubic root of 28905358 is about 306.8970997008.

The spelling of 28905358 in words is "twenty-eight million, nine hundred five thousand, three hundred fifty-eight".