28239035 has 32 divisors (see below), whose sum is σ = 39640320. Its totient is φ = 19094400.

The previous prime is 28239031. The next prime is 28239049. The reversal of 28239035 is 53093282.

It is not a de Polignac number, because 28239035 - 2² = 28239031 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28238992 and 28239010.

It is not an unprimeable number, because it can be changed into a prime (28239031) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 63524 + ... + 63966.

It is an arithmetic number, because the mean of its divisors is an integer number (1238760).

Almost surely, 2^28239035 is an apocalyptic number.

28239035 is a deficient number, since it is larger than the sum of its proper divisors (11401285).

28239035 is a wasteful number, since it uses less digits than its factorization.

28239035 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 28239035 is about 5314.0413058237. The cubic root of 28239035 is about 304.5205582165.

The spelling of 28239035 in words is "twenty-eight million, two hundred thirty-nine thousand, thirty-five".