28196459 has 4 divisors (see below), whose sum is σ = 29422416. Its totient is φ = 26970504.

The previous prime is 28196449. The next prime is 28196461. The reversal of 28196459 is 95469182.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28196459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28196419) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 612944 + ... + 612989.

It is an arithmetic number, because the mean of its divisors is an integer number (7355604).

Almost surely, 2^28196459 is an apocalyptic number.

28196459 is a deficient number, since it is larger than the sum of its proper divisors (1225957).

28196459 is a wasteful number, since it uses less digits than its factorization.

28196459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1225956.

The product of its digits is 155520, while the sum is 44.

The square root of 28196459 is about 5310.0338040355. The cubic root of 28196459 is about 304.3674393314.

The spelling of 28196459 in words is "twenty-eight million, one hundred ninety-six thousand, four hundred fifty-nine".