28673858 has 8 divisors (see below), whose sum is σ = 43299900. Its totient is φ = 14240560.

The previous prime is 28673857. The next prime is 28673891. The reversal of 28673858 is 85837682.

It can be written as a sum of positive squares in 2 ways, for example, as 28121809 + 552049 = 5303^2 + 743^2 .

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

It is a super-3 number, since 3×28673858³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (28673851) 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, 47813 + ... + 48408.

Almost surely, 2^28673858 is an apocalyptic number.

28673858 is a deficient number, since it is larger than the sum of its proper divisors (14626042).

28673858 is a wasteful number, since it uses less digits than its factorization.

28673858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96372.

The product of its digits is 645120, while the sum is 47.

The square root of 28673858 is about 5354.7976619103. The cubic root of 28673858 is about 306.0756003845.

The spelling of 28673858 in words is "twenty-eight million, six hundred seventy-three thousand, eight hundred fifty-eight".