28393667 has 2 divisors, whose sum is σ = 28393668. Its totient is φ = 28393666.

The previous prime is 28393663. The next prime is 28393693. The reversal of 28393667 is 76639382.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28393667 - 2² = 28393663 is a prime.

It is not a weakly prime, because it can be changed into another prime (28393663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14196833 + 14196834.

It is an arithmetic number, because the mean of its divisors is an integer number (14196834).

Almost surely, 2^28393667 is an apocalyptic number.

28393667 is a deficient number, since it is larger than the sum of its proper divisors (1).

28393667 is an equidigital number, since it uses as much as digits as its factorization.

28393667 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 44.

The square root of 28393667 is about 5328.5708215243. The cubic root of 28393667 is about 305.0753804545.

The spelling of 28393667 in words is "twenty-eight million, three hundred ninety-three thousand, six hundred sixty-seven".