28133942 has 8 divisors (see below), whose sum is σ = 42243600. Its totient is φ = 14052744.

The previous prime is 28133939. The next prime is 28133951. The reversal of 28133942 is 24933182.

It is a happy number.

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 = 28133899 and 28133908.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4442 + ... + 8717.

It is an arithmetic number, because the mean of its divisors is an integer number (5280450).

Almost surely, 2^28133942 is an apocalyptic number.

28133942 is a deficient number, since it is larger than the sum of its proper divisors (14109658).

28133942 is a wasteful number, since it uses less digits than its factorization.

28133942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14230.

The product of its digits is 10368, while the sum is 32.

The square root of 28133942 is about 5304.1438517446. The cubic root of 28133942 is about 304.1423257267.

The spelling of 28133942 in words is "twenty-eight million, one hundred thirty-three thousand, nine hundred forty-two".