28726667 has 2 divisors, whose sum is σ = 28726668. Its totient is φ = 28726666.

The previous prime is 28726661. The next prime is 28726673. The reversal of 28726667 is 76662782.

It is a balanced prime because it is at equal distance from previous prime (28726661) and next prime (28726673).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28726667 is a prime.

It is not a weakly prime, because it can be changed into another prime (28726661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14363333 + 14363334.

It is an arithmetic number, because the mean of its divisors is an integer number (14363334).

Almost surely, 2^28726667 is an apocalyptic number.

28726667 is a deficient number, since it is larger than the sum of its proper divisors (1).

28726667 is an equidigital number, since it uses as much as digits as its factorization.

28726667 is an evil number, because the sum of its binary digits is even.

The product of its digits is 338688, while the sum is 44.

The square root of 28726667 is about 5359.7263922704. The cubic root of 28726667 is about 306.2633862259.

The spelling of 28726667 in words is "twenty-eight million, seven hundred twenty-six thousand, six hundred sixty-seven".