28970141 has 4 divisors (see below), whose sum is σ = 29053500. Its totient is φ = 28886784.

The previous prime is 28970119. The next prime is 28970147. The reversal of 28970141 is 14107982.

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

It can be written as a sum of positive squares in 2 ways, for example, as 19545241 + 9424900 = 4421^2 + 3070^2 .

It is a cyclic number.

It is not a de Polignac number, because 28970141 - 2⁶ = 28970077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28970098 and 28970107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28970147) 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 3 ways as a sum of consecutive naturals, for example, 41156 + ... + 41853.

It is an arithmetic number, because the mean of its divisors is an integer number (7263375).

Almost surely, 2^28970141 is an apocalyptic number.

It is an amenable number.

28970141 is a deficient number, since it is larger than the sum of its proper divisors (83359).

28970141 is an equidigital number, since it uses as much as digits as its factorization.

28970141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83358.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 28970141 is about 5382.3917546013. The cubic root of 28970141 is about 307.1262023265.

The spelling of 28970141 in words is "twenty-eight million, nine hundred seventy thousand, one hundred forty-one".