28039459 has 8 divisors (see below), whose sum is σ = 33731840. Its totient is φ = 22768776.

The previous prime is 28039439. The next prime is 28039463. The reversal of 28039459 is 95493082.

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 28039459 - 2⁷ = 28039331 is a prime.

It is a super-2 number, since 2×28039459² = 1572422522025362, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28039439) 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, 105279 + ... + 105544.

It is an arithmetic number, because the mean of its divisors is an integer number (4216480).

Almost surely, 2^28039459 is an apocalyptic number.

28039459 is a deficient number, since it is larger than the sum of its proper divisors (5692381).

28039459 is a wasteful number, since it uses less digits than its factorization.

28039459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210849.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 28039459 is about 5295.2298344831. The cubic root of 28039459 is about 303.8014740000.

The spelling of 28039459 in words is "twenty-eight million, thirty-nine thousand, four hundred fifty-nine".