28259497 has 8 divisors (see below), whose sum is σ = 32617152. Its totient is φ = 23982000.

The previous prime is 28259477. The next prime is 28259501. The reversal of 28259497 is 79495282.

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

It is not a de Polignac number, because 28259497 - 2¹⁵ = 28226729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28259437) 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, 19279 + ... + 20692.

It is an arithmetic number, because the mean of its divisors is an integer number (4077144).

Almost surely, 2^28259497 is an apocalyptic number.

It is an amenable number.

28259497 is a deficient number, since it is larger than the sum of its proper divisors (4357655).

28259497 is a wasteful number, since it uses less digits than its factorization.

28259497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40079.

The product of its digits is 362880, while the sum is 46.

The square root of 28259497 is about 5315.9662339033. The cubic root of 28259497 is about 304.5940923068.

The spelling of 28259497 in words is "twenty-eight million, two hundred fifty-nine thousand, four hundred ninety-seven".