28257373 has 4 divisors (see below), whose sum is σ = 28480000. Its totient is φ = 28034748.

The previous prime is 28257371. The next prime is 28257377. The reversal of 28257373 is 37375282.

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 28257373 - 2¹ = 28257371 is a prime.

It is a super-2 number, since 2×28257373² = 1596958257722258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28257371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111123 + ... + 111376.

It is an arithmetic number, because the mean of its divisors is an integer number (7120000).

Almost surely, 2^28257373 is an apocalyptic number.

It is an amenable number.

28257373 is a deficient number, since it is larger than the sum of its proper divisors (222627).

28257373 is a wasteful number, since it uses less digits than its factorization.

28257373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222626.

The product of its digits is 70560, while the sum is 37.

The square root of 28257373 is about 5315.7664546140. The cubic root of 28257373 is about 304.5864609600.

The spelling of 28257373 in words is "twenty-eight million, two hundred fifty-seven thousand, three hundred seventy-three".