28437897 has 8 divisors (see below), whose sum is σ = 37969344. Its totient is φ = 18932528.

The previous prime is 28437869. The next prime is 28437901. The reversal of 28437897 is 79873482.

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

It is a cyclic number.

It is not a de Polignac number, because 28437897 - 2⁷ = 28437769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28437817) 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, 3813 + ... + 8450.

It is an arithmetic number, because the mean of its divisors is an integer number (4746168).

Almost surely, 2^28437897 is an apocalyptic number.

It is an amenable number.

28437897 is a deficient number, since it is larger than the sum of its proper divisors (9531447).

28437897 is a wasteful number, since it uses less digits than its factorization.

28437897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13039.

The product of its digits is 677376, while the sum is 48.

The square root of 28437897 is about 5332.7194750896. The cubic root of 28437897 is about 305.2337078224.

The spelling of 28437897 in words is "twenty-eight million, four hundred thirty-seven thousand, eight hundred ninety-seven".