28671923 has 8 divisors (see below), whose sum is σ = 33898080. Its totient is φ = 23728320.

The previous prime is 28671919. The next prime is 28671941. The reversal of 28671923 is 32917682.

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

It is not a de Polignac number, because 28671923 - 2² = 28671919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28671953) 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, 70418 + ... + 70823.

It is an arithmetic number, because the mean of its divisors is an integer number (4237260).

Almost surely, 2^28671923 is an apocalyptic number.

28671923 is a deficient number, since it is larger than the sum of its proper divisors (5226157).

28671923 is a wasteful number, since it uses less digits than its factorization.

28671923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141277.

The product of its digits is 36288, while the sum is 38.

The square root of 28671923 is about 5354.6169797662. The cubic root of 28671923 is about 306.0687152558.

The spelling of 28671923 in words is "twenty-eight million, six hundred seventy-one thousand, nine hundred twenty-three".