28641419 has 2 divisors, whose sum is σ = 28641420. Its totient is φ = 28641418.

The previous prime is 28641407. The next prime is 28641433. The reversal of 28641419 is 91414682.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28641419 is a prime.

It is a super-2 number, since 2×28641419² = 1640661764667122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28640419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14320709 + 14320710.

It is an arithmetic number, because the mean of its divisors is an integer number (14320710).

Almost surely, 2^28641419 is an apocalyptic number.

28641419 is a deficient number, since it is larger than the sum of its proper divisors (1).

28641419 is an equidigital number, since it uses as much as digits as its factorization.

28641419 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 35.

The square root of 28641419 is about 5351.7678387613. The cubic root of 28641419 is about 305.9601347813.

The spelling of 28641419 in words is "twenty-eight million, six hundred forty-one thousand, four hundred nineteen".