28207893 has 8 divisors (see below), whose sum is σ = 42983488. Its totient is φ = 16118784.

The previous prime is 28207853. The next prime is 28207901. The reversal of 28207893 is 39870282.

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

It is not a de Polignac number, because 28207893 - 2²² = 24013589 is a prime.

It is a super-3 number, since 3×28207893³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28207853) 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, 671596 + ... + 671637.

It is an arithmetic number, because the mean of its divisors is an integer number (5372936).

Almost surely, 2^28207893 is an apocalyptic number.

It is an amenable number.

28207893 is a deficient number, since it is larger than the sum of its proper divisors (14775595).

28207893 is a wasteful number, since it uses less digits than its factorization.

28207893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1343243.

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 28207893 is about 5311.1103358902. The cubic root of 28207893 is about 304.4085753123.

The spelling of 28207893 in words is "twenty-eight million, two hundred seven thousand, eight hundred ninety-three".