28319419 has 2 divisors, whose sum is σ = 28319420. Its totient is φ = 28319418.

The previous prime is 28319381. The next prime is 28319429. The reversal of 28319419 is 91491382.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28319419 - 2²¹ = 26222267 is a prime.

It is a super-2 number, since 2×28319419² = 1603978984995122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28319429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14159709 + 14159710.

It is an arithmetic number, because the mean of its divisors is an integer number (14159710).

Almost surely, 2^28319419 is an apocalyptic number.

28319419 is a deficient number, since it is larger than the sum of its proper divisors (1).

28319419 is an equidigital number, since it uses as much as digits as its factorization.

28319419 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 37.

The square root of 28319419 is about 5321.5992896873. The cubic root of 28319419 is about 304.8092294436.

The spelling of 28319419 in words is "twenty-eight million, three hundred nineteen thousand, four hundred nineteen".