28972667 has 2 divisors, whose sum is σ = 28972668. Its totient is φ = 28972666.

The previous prime is 28972649. The next prime is 28972673. The reversal of 28972667 is 76627982.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28972667 - 2¹⁰ = 28971643 is a prime.

It is not a weakly prime, because it can be changed into another prime (28972367) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14486333 + 14486334.

It is an arithmetic number, because the mean of its divisors is an integer number (14486334).

Almost surely, 2^28972667 is an apocalyptic number.

28972667 is a deficient number, since it is larger than the sum of its proper divisors (1).

28972667 is an equidigital number, since it uses as much as digits as its factorization.

28972667 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 508032, while the sum is 47.

The square root of 28972667 is about 5382.6264035320. The cubic root of 28972667 is about 307.1351285083.

The spelling of 28972667 in words is "twenty-eight million, nine hundred seventy-two thousand, six hundred sixty-seven".