28252437 has 4 divisors (see below), whose sum is σ = 37669920. Its totient is φ = 18834956.

The previous prime is 28252397. The next prime is 28252447. The reversal of 28252437 is 73425282.

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 28252437 - 2¹⁰ = 28251413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28252398 and 28252407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28252447) 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, 4708737 + ... + 4708742.

It is an arithmetic number, because the mean of its divisors is an integer number (9417480).

Almost surely, 2^28252437 is an apocalyptic number.

It is an amenable number.

28252437 is a deficient number, since it is larger than the sum of its proper divisors (9417483).

28252437 is an equidigital number, since it uses as much as digits as its factorization.

28252437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9417482.

The product of its digits is 26880, while the sum is 33.

The square root of 28252437 is about 5315.3021550990. The cubic root of 28252437 is about 304.5687248654.

The spelling of 28252437 in words is "twenty-eight million, two hundred fifty-two thousand, four hundred thirty-seven".