28970535 has 32 divisors (see below), whose sum is σ = 53233920. Its totient is φ = 13305600.

The previous prime is 28970531. The next prime is 28970549. The reversal of 28970535 is 53507982.

It is not a de Polignac number, because 28970535 - 2² = 28970531 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28970493 and 28970502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28970531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1486 + ... + 7755.

It is an arithmetic number, because the mean of its divisors is an integer number (1663560).

Almost surely, 2^28970535 is an apocalyptic number.

28970535 is a deficient number, since it is larger than the sum of its proper divisors (24263385).

28970535 is a wasteful number, since it uses less digits than its factorization.

28970535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9279.

The product of its (nonzero) digits is 75600, while the sum is 39.

The square root of 28970535 is about 5382.4283553058. The cubic root of 28970535 is about 307.1275946471.

The spelling of 28970535 in words is "twenty-eight million, nine hundred seventy thousand, five hundred thirty-five".