28031073 has 8 divisors (see below), whose sum is σ = 42714048. Its totient is φ = 16017744.

The previous prime is 28031071. The next prime is 28031083. The reversal of 28031073 is 37013082.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28031073 - 2¹ = 28031071 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28031071) 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 7 ways as a sum of consecutive naturals, for example, 667386 + ... + 667427.

It is an arithmetic number, because the mean of its divisors is an integer number (5339256).

Almost surely, 2^28031073 is an apocalyptic number.

It is an amenable number.

28031073 is a deficient number, since it is larger than the sum of its proper divisors (14682975).

28031073 is a wasteful number, since it uses less digits than its factorization.

28031073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1334823.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 28031073 is about 5294.4379305078. The cubic root of 28031073 is about 303.7711841480.

Subtracting 28031073 from its reverse (37013082), we obtain a square (8982009 = 2997²).

The spelling of 28031073 in words is "twenty-eight million, thirty-one thousand, seventy-three".