28023037 has 4 divisors (see below), whose sum is σ = 32026336. Its totient is φ = 24019740.

The previous prime is 28023031. The next prime is 28023071. The reversal of 28023037 is 73032082.

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, and also an emirpimes, since its reverse is a distinct semiprime: 73032082 = 2 ⋅36516041.

It is a cyclic number.

It is not a de Polignac number, because 28023037 - 2³ = 28023029 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 (28023031) 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, 2001639 + ... + 2001652.

It is an arithmetic number, because the mean of its divisors is an integer number (8006584).

Almost surely, 2^28023037 is an apocalyptic number.

It is an amenable number.

28023037 is a deficient number, since it is larger than the sum of its proper divisors (4003299).

28023037 is an equidigital number, since it uses as much as digits as its factorization.

28023037 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4003298.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 28023037 is about 5293.6789664656. The cubic root of 28023037 is about 303.7421528114.

The spelling of 28023037 in words is "twenty-eight million, twenty-three thousand, thirty-seven".