28136459 has 8 divisors (see below), whose sum is σ = 30343152. Its totient is φ = 25935840.

The previous prime is 28136447. The next prime is 28136461. The reversal of 28136459 is 95463182.

It is a happy number.

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 28136459 - 2⁴ = 28136443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28136489) 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, 14189 + ... + 16049.

It is an arithmetic number, because the mean of its divisors is an integer number (3792894).

Almost surely, 2^28136459 is an apocalyptic number.

28136459 is a deficient number, since it is larger than the sum of its proper divisors (2206693).

28136459 is a wasteful number, since it uses less digits than its factorization.

28136459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3037.

The product of its digits is 51840, while the sum is 38.

The square root of 28136459 is about 5304.3811137587. The cubic root of 28136459 is about 304.1513954761.

The spelling of 28136459 in words is "twenty-eight million, one hundred thirty-six thousand, four hundred fifty-nine".