28970105 has 8 divisors (see below), whose sum is σ = 34995264. Its totient is φ = 23022000.

The previous prime is 28970099. The next prime is 28970107. The reversal of 28970105 is 50107982.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28970105 - 2⁸ = 28969849 is a prime.

It is a super-2 number, since 2×28970105² = 1678533967422050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28970107) 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 7 ways as a sum of consecutive naturals, for example, 18431 + ... + 19940.

It is an arithmetic number, because the mean of its divisors is an integer number (4374408).

Almost surely, 2^28970105 is an apocalyptic number.

It is an amenable number.

28970105 is a deficient number, since it is larger than the sum of its proper divisors (6025159).

28970105 is a wasteful number, since it uses less digits than its factorization.

28970105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38527.

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 28970105 is about 5382.3884103621. The cubic root of 28970105 is about 307.1260751087.

The spelling of 28970105 in words is "twenty-eight million, nine hundred seventy thousand, one hundred five".