28990667 has 2 divisors, whose sum is σ = 28990668. Its totient is φ = 28990666.

The previous prime is 28990657. The next prime is 28990711. The reversal of 28990667 is 76609982.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28990667 - 2⁴ = 28990651 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28990607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14495333 + 14495334.

It is an arithmetic number, because the mean of its divisors is an integer number (14495334).

Almost surely, 2^28990667 is an apocalyptic number.

28990667 is a deficient number, since it is larger than the sum of its proper divisors (1).

28990667 is an equidigital number, since it uses as much as digits as its factorization.

28990667 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 326592, while the sum is 47.

The square root of 28990667 is about 5384.2981901080. The cubic root of 28990667 is about 307.1987204887.

The spelling of 28990667 in words is "twenty-eight million, nine hundred ninety thousand, six hundred sixty-seven".