28339971 has 8 divisors (see below), whose sum is σ = 41221824. Its totient is φ = 17175720.

The previous prime is 28339951. The next prime is 28339973. The reversal of 28339971 is 17993382.

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

It is not a de Polignac number, because 28339971 - 2¹¹ = 28337923 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28339973) 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, 429361 + ... + 429426.

It is an arithmetic number, because the mean of its divisors is an integer number (5152728).

Almost surely, 2^28339971 is an apocalyptic number.

28339971 is a deficient number, since it is larger than the sum of its proper divisors (12881853).

28339971 is a wasteful number, since it uses less digits than its factorization.

28339971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 858801.

The product of its digits is 81648, while the sum is 42.

The square root of 28339971 is about 5323.5299379265. The cubic root of 28339971 is about 304.8829471104.

The spelling of 28339971 in words is "twenty-eight million, three hundred thirty-nine thousand, nine hundred seventy-one".