28970547 has 16 divisors (see below), whose sum is σ = 40973568. Its totient is φ = 18168480.

The previous prime is 28970531. The next prime is 28970549. The reversal of 28970547 is 74507982.

It is not a de Polignac number, because 28970547 - 2⁴ = 28970531 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28970499 and 28970508.

It is not an unprimeable number, because it can be changed into a prime (28970549) 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 15 ways as a sum of consecutive naturals, for example, 768 + ... + 7650.

It is an arithmetic number, because the mean of its divisors is an integer number (2560848).

Almost surely, 2^28970547 is an apocalyptic number.

28970547 is a deficient number, since it is larger than the sum of its proper divisors (12003021).

28970547 is a wasteful number, since it uses less digits than its factorization.

28970547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6970.

The product of its (nonzero) digits is 141120, while the sum is 42.

The square root of 28970547 is about 5382.4294700442. The cubic root of 28970547 is about 307.1276370526.

The spelling of 28970547 in words is "twenty-eight million, nine hundred seventy thousand, five hundred forty-seven".