28694899 has 2 divisors, whose sum is σ = 28694900. Its totient is φ = 28694898.

The previous prime is 28694849. The next prime is 28694903. The reversal of 28694899 is 99849682.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28694899 - 2²³ = 20306291 is a prime.

It is not a weakly prime, because it can be changed into another prime (28694849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14347449 + 14347450.

It is an arithmetic number, because the mean of its divisors is an integer number (14347450).

Almost surely, 2^28694899 is an apocalyptic number.

28694899 is a deficient number, since it is larger than the sum of its proper divisors (1).

28694899 is an equidigital number, since it uses as much as digits as its factorization.

28694899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2239488, while the sum is 55.

The square root of 28694899 is about 5356.7619883657. The cubic root of 28694899 is about 306.1504486090.

The spelling of 28694899 in words is "twenty-eight million, six hundred ninety-four thousand, eight hundred ninety-nine".