28879238 has 8 divisors (see below), whose sum is σ = 43912488. Its totient is φ = 14241744.

The previous prime is 28879229. The next prime is 28879247. The reversal of 28879238 is 83297882.

It is an interprime number because it is at equal distance from previous prime (28879229) and next prime (28879247).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 28879192 and 28879201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98756 + ... + 99047.

It is an arithmetic number, because the mean of its divisors is an integer number (5489061).

Almost surely, 2^28879238 is an apocalyptic number.

28879238 is a deficient number, since it is larger than the sum of its proper divisors (15033250).

28879238 is a wasteful number, since it uses less digits than its factorization.

28879238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197878.

The product of its digits is 387072, while the sum is 47.

The square root of 28879238 is about 5373.9406397913. The cubic root of 28879238 is about 306.8046304773.

The spelling of 28879238 in words is "twenty-eight million, eight hundred seventy-nine thousand, two hundred thirty-eight".