28073953 has 4 divisors (see below), whose sum is σ = 29725380. Its totient is φ = 26422528.

The previous prime is 28073951. The next prime is 28073957. The reversal of 28073953 is 35937082.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16703569 + 11370384 = 4087^2 + 3372^2 .

It is a cyclic number.

It is not a de Polignac number, because 28073953 - 2¹ = 28073951 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28073951) 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, 825688 + ... + 825721.

It is an arithmetic number, because the mean of its divisors is an integer number (7431345).

Almost surely, 2^28073953 is an apocalyptic number.

It is an amenable number.

28073953 is a deficient number, since it is larger than the sum of its proper divisors (1651427).

28073953 is a wasteful number, since it uses less digits than its factorization.

28073953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1651426.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 28073953 is about 5298.4859158065. The cubic root of 28073953 is about 303.9260012929.

The spelling of 28073953 in words is "twenty-eight million, seventy-three thousand, nine hundred fifty-three".