28693447 has 2 divisors, whose sum is σ = 28693448. Its totient is φ = 28693446.

The previous prime is 28693429. The next prime is 28693451. The reversal of 28693447 is 74439682.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28693447 - 2⁷ = 28693319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28693747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14346723 + 14346724.

It is an arithmetic number, because the mean of its divisors is an integer number (14346724).

Almost surely, 2^28693447 is an apocalyptic number.

28693447 is a deficient number, since it is larger than the sum of its proper divisors (1).

28693447 is an equidigital number, since it uses as much as digits as its factorization.

28693447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 43.

The square root of 28693447 is about 5356.6264570156. The cubic root of 28693447 is about 306.1452846488.

The spelling of 28693447 in words is "twenty-eight million, six hundred ninety-three thousand, four hundred forty-seven".