28891373 has 8 divisors (see below), whose sum is σ = 33057792. Its totient is φ = 24734736.

The previous prime is 28891367. The next prime is 28891403. The reversal of 28891373 is 37319882.

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

It is a cyclic number.

It is not a de Polignac number, because 28891373 - 2⁶ = 28891309 is a prime.

It is a super-2 number, since 2×28891373² = 1669422867650258, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28891373.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28891363) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5711 + ... + 9507.

It is an arithmetic number, because the mean of its divisors is an integer number (4132224).

Almost surely, 2^28891373 is an apocalyptic number.

It is an amenable number.

28891373 is a deficient number, since it is larger than the sum of its proper divisors (4166419).

28891373 is a wasteful number, since it uses less digits than its factorization.

28891373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4891.

The product of its digits is 72576, while the sum is 41.

The square root of 28891373 is about 5375.0695809450. The cubic root of 28891373 is about 306.8475973640.

The spelling of 28891373 in words is "twenty-eight million, eight hundred ninety-one thousand, three hundred seventy-three".