28963967 has 2 divisors, whose sum is σ = 28963968. Its totient is φ = 28963966.

The previous prime is 28963943. The next prime is 28964009. The reversal of 28963967 is 76936982.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28963967 - 2¹⁰ = 28962943 is a prime.

It is a super-2 number, since 2×28963967² = 1677822768754178, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28963367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14481983 + 14481984.

It is an arithmetic number, because the mean of its divisors is an integer number (14481984).

Almost surely, 2^28963967 is an apocalyptic number.

28963967 is a deficient number, since it is larger than the sum of its proper divisors (1).

28963967 is an equidigital number, since it uses as much as digits as its factorization.

28963967 is an evil number, because the sum of its binary digits is even.

The product of its digits is 979776, while the sum is 50.

The square root of 28963967 is about 5381.8181871929. The cubic root of 28963967 is about 307.1043829425.

The spelling of 28963967 in words is "twenty-eight million, nine hundred sixty-three thousand, nine hundred sixty-seven".