28072373 has 4 divisors (see below), whose sum is σ = 32082720. Its totient is φ = 24062028.

The previous prime is 28072361. The next prime is 28072379. The reversal of 28072373 is 37327082.

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 28072373 - 2⁶ = 28072309 is a prime.

It is a super-2 number, since 2×28072373² = 1576116251702258, 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 (28072379) 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, 2005163 + ... + 2005176.

It is an arithmetic number, because the mean of its divisors is an integer number (8020680).

Almost surely, 2^28072373 is an apocalyptic number.

It is an amenable number.

28072373 is a deficient number, since it is larger than the sum of its proper divisors (4010347).

28072373 is an equidigital number, since it uses as much as digits as its factorization.

28072373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4010346.

The product of its (nonzero) digits is 14112, while the sum is 32.

The square root of 28072373 is about 5298.3368145108. The cubic root of 28072373 is about 303.9202995417.

The spelling of 28072373 in words is "twenty-eight million, seventy-two thousand, three hundred seventy-three".