28297671 has 8 divisors (see below), whose sum is σ = 37922544. Its totient is φ = 18768960.

The previous prime is 28297657. The next prime is 28297679. The reversal of 28297671 is 17679282.

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

It is not a de Polignac number, because 28297671 - 2¹¹ = 28295623 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28297679) 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, 23350 + ... + 24531.

It is an arithmetic number, because the mean of its divisors is an integer number (4740318).

Almost surely, 2^28297671 is an apocalyptic number.

28297671 is a deficient number, since it is larger than the sum of its proper divisors (9624873).

28297671 is a wasteful number, since it uses less digits than its factorization.

28297671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48081.

The product of its digits is 84672, while the sum is 42.

The square root of 28297671 is about 5319.5555265454. Note that the first 4 decimals coincide. The cubic root of 28297671 is about 304.7311830123.

The spelling of 28297671 in words is "twenty-eight million, two hundred ninety-seven thousand, six hundred seventy-one".