28888619 has 2 divisors, whose sum is σ = 28888620. Its totient is φ = 28888618.

The previous prime is 28888577. The next prime is 28888649. The reversal of 28888619 is 91688882.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28888619 is a prime.

It is a super-2 number, since 2×28888619² = 1669104615454322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28888649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14444309 + 14444310.

It is an arithmetic number, because the mean of its divisors is an integer number (14444310).

Almost surely, 2^28888619 is an apocalyptic number.

28888619 is a deficient number, since it is larger than the sum of its proper divisors (1).

28888619 is an equidigital number, since it uses as much as digits as its factorization.

28888619 is an evil number, because the sum of its binary digits is even.

The product of its digits is 442368, while the sum is 50.

The square root of 28888619 is about 5374.8133921095. The cubic root of 28888619 is about 306.8378472201.

The spelling of 28888619 in words is "twenty-eight million, eight hundred eighty-eight thousand, six hundred nineteen".