28939373 has 4 divisors (see below), whose sum is σ = 28970880. Its totient is φ = 28907868.

The previous prime is 28939369. The next prime is 28939381. The reversal of 28939373 is 37393982.

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 28939373 - 2² = 28939369 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28939333) 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, 14333 + ... + 16226.

It is an arithmetic number, because the mean of its divisors is an integer number (7242720).

Almost surely, 2^28939373 is an apocalyptic number.

It is an amenable number.

28939373 is a deficient number, since it is larger than the sum of its proper divisors (31507).

28939373 is an equidigital number, since it uses as much as digits as its factorization.

28939373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31506.

The product of its digits is 244944, while the sum is 44.

The square root of 28939373 is about 5379.5327864044. The cubic root of 28939373 is about 307.0174350922.

The spelling of 28939373 in words is "twenty-eight million, nine hundred thirty-nine thousand, three hundred seventy-three".