28342937 has 4 divisors (see below), whose sum is σ = 32391936. Its totient is φ = 24293940.

The previous prime is 28342933. The next prime is 28342957. The reversal of 28342937 is 73924382.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28342937 - 2² = 28342933 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28342937.

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 3 ways as a sum of consecutive naturals, for example, 2024489 + ... + 2024502.

It is an arithmetic number, because the mean of its divisors is an integer number (8097984).

Almost surely, 2^28342937 is an apocalyptic number.

It is an amenable number.

28342937 is a deficient number, since it is larger than the sum of its proper divisors (4048999).

28342937 is an equidigital number, since it uses as much as digits as its factorization.

28342937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4048998.

The product of its digits is 72576, while the sum is 38.

The square root of 28342937 is about 5323.8085051963. The cubic root of 28342937 is about 304.8935828691.

The spelling of 28342937 in words is "twenty-eight million, three hundred forty-two thousand, nine hundred thirty-seven".