28342938 has 16 divisors (see below), whose sum is σ = 61046496. Its totient is φ = 8720880.

The previous prime is 28342933. The next prime is 28342957. The reversal of 28342938 is 83924382.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28342896 and 28342905.

It is not an unprimeable number, because it can be changed into a prime (28342933) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 181608 + ... + 181763.

It is an arithmetic number, because the mean of its divisors is an integer number (3815406).

Almost surely, 2^28342938 is an apocalyptic number.

28342938 is an abundant number, since it is smaller than the sum of its proper divisors (32703558).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28342938 is a wasteful number, since it uses less digits than its factorization.

28342938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363389.

The product of its digits is 82944, while the sum is 39.

The square root of 28342938 is about 5323.8085991140. The cubic root of 28342938 is about 304.8935864549.

The spelling of 28342938 in words is "twenty-eight million, three hundred forty-two thousand, nine hundred thirty-eight".