28667937 has 8 divisors (see below), whose sum is σ = 38405920. Its totient is φ = 19020960.

The previous prime is 28667929. The next prime is 28667953. The reversal of 28667937 is 73976682.

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

It is not a de Polignac number, because 28667937 - 2³ = 28667929 is a prime.

It is a super-2 number, since 2×28667937² = 1643701223671938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28667917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22012 + ... + 23277.

It is an arithmetic number, because the mean of its divisors is an integer number (4800740).

Almost surely, 2^28667937 is an apocalyptic number.

It is an amenable number.

28667937 is a deficient number, since it is larger than the sum of its proper divisors (9737983).

28667937 is a wasteful number, since it uses less digits than its factorization.

28667937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45503.

The product of its digits is 762048, while the sum is 48.

The square root of 28667937 is about 5354.2447646704. The cubic root of 28667937 is about 306.0545312701.

The spelling of 28667937 in words is "twenty-eight million, six hundred sixty-seven thousand, nine hundred thirty-seven".