28993967 has 2 divisors, whose sum is σ = 28993968. Its totient is φ = 28993966.

The previous prime is 28993949. The next prime is 28993999. The reversal of 28993967 is 76939982.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28993967 - 2²⁴ = 12216751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28993927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14496983 + 14496984.

It is an arithmetic number, because the mean of its divisors is an integer number (14496984).

Almost surely, 2^28993967 is an apocalyptic number.

28993967 is a deficient number, since it is larger than the sum of its proper divisors (1).

28993967 is an equidigital number, since it uses as much as digits as its factorization.

28993967 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1469664, while the sum is 53.

The square root of 28993967 is about 5384.6046280112. The cubic root of 28993967 is about 307.2103761630.

The spelling of 28993967 in words is "twenty-eight million, nine hundred ninety-three thousand, nine hundred sixty-seven".