28846921 has 8 divisors (see below), whose sum is σ = 30528000. Its totient is φ = 27182160.

The previous prime is 28846897. The next prime is 28846969. The reversal of 28846921 is 12964882.

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

It is not a de Polignac number, because 28846921 - 2¹⁷ = 28715849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28846121) 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, 346 + ... + 7603.

It is an arithmetic number, because the mean of its divisors is an integer number (3816000).

Almost surely, 2^28846921 is an apocalyptic number.

It is an amenable number.

28846921 is a deficient number, since it is larger than the sum of its proper divisors (1681079).

28846921 is a wasteful number, since it uses less digits than its factorization.

28846921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8159.

The product of its digits is 55296, while the sum is 40.

The square root of 28846921 is about 5370.9329729573. The cubic root of 28846921 is about 306.6901456241.

The spelling of 28846921 in words is "twenty-eight million, eight hundred forty-six thousand, nine hundred twenty-one".