28126838 has 8 divisors (see below), whose sum is σ = 44024688. Its totient is φ = 13451944.

The previous prime is 28126793. The next prime is 28126843. The reversal of 28126838 is 83862182.

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

It is a super-2 number, since 2×28126838² = 1582238031756488, which contains 22 as substring.

It is a Curzon number.

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, 305681 + ... + 305772.

It is an arithmetic number, because the mean of its divisors is an integer number (5503086).

Almost surely, 2^28126838 is an apocalyptic number.

28126838 is a deficient number, since it is larger than the sum of its proper divisors (15897850).

28126838 is a wasteful number, since it uses less digits than its factorization.

28126838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611478.

The product of its digits is 36864, while the sum is 38.

The square root of 28126838 is about 5303.4741443699. The cubic root of 28126838 is about 304.1167242787.

The spelling of 28126838 in words is "twenty-eight million, one hundred twenty-six thousand, eight hundred thirty-eight".