28933942 has 4 divisors (see below), whose sum is σ = 43400916. Its totient is φ = 14466970.

The previous prime is 28933939. The next prime is 28934011. The reversal of 28933942 is 24933982.

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

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 junction number, because it is equal to n+sod(n) for n = 28933895 and 28933904.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7233484 + ... + 7233487.

It is an arithmetic number, because the mean of its divisors is an integer number (10850229).

Almost surely, 2^28933942 is an apocalyptic number.

28933942 is a deficient number, since it is larger than the sum of its proper divisors (14466974).

28933942 is a wasteful number, since it uses less digits than its factorization.

28933942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14466973.

The product of its digits is 93312, while the sum is 40.

The square root of 28933942 is about 5379.0279791055. The cubic root of 28933942 is about 306.9982280877.

Adding to 28933942 its sum of digits (40), we get a palindrome (28933982).

The spelling of 28933942 in words is "twenty-eight million, nine hundred thirty-three thousand, nine hundred forty-two".