28969238 has 4 divisors (see below), whose sum is σ = 43453860. Its totient is φ = 14484618.

The previous prime is 28969223. The next prime is 28969267. The reversal of 28969238 is 83296982.

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

It is a junction number, because it is equal to n+sod(n) for n = 28969192 and 28969201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7242308 + ... + 7242311.

It is an arithmetic number, because the mean of its divisors is an integer number (10863465).

Almost surely, 2^28969238 is an apocalyptic number.

28969238 is a deficient number, since it is larger than the sum of its proper divisors (14484622).

28969238 is a wasteful number, since it uses less digits than its factorization.

28969238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14484621.

The product of its digits is 373248, while the sum is 47.

The square root of 28969238 is about 5382.3078693066. The cubic root of 28969238 is about 307.1230112496.

The spelling of 28969238 in words is "twenty-eight million, nine hundred sixty-nine thousand, two hundred thirty-eight".