28970 has 8 divisors (see below), whose sum is σ = 52164. Its totient is φ = 11584.

The previous prime is 28961. The next prime is 28979. The reversal of 28970 is 7982.

It is an interprime number because it is at equal distance from previous prime (28961) and next prime (28979).

It can be written as a sum of positive squares in 2 ways, for example, as 26569 + 2401 = 163^2 + 49^2 .

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

It is not an unprimeable number, because it can be changed into a prime (28979) by changing a digit.

28970 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1439 + ... + 1458.

2²⁸⁹⁷⁰ is an apocalyptic number.

28970 is a deficient number, since it is larger than the sum of its proper divisors (23194).

28970 is a wasteful number, since it uses less digits than its factorization.

28970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2904.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 28970 is about 170.2057578345. The cubic root of 28970 is about 30.7125704056.

The spelling of 28970 in words is "twenty-eight thousand, nine hundred seventy".