28744619 has 2 divisors, whose sum is σ = 28744620. Its totient is φ = 28744618.

The previous prime is 28744571. The next prime is 28744621. The reversal of 28744619 is 91644782.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28744619 is a prime.

It is a super-2 number, since 2×28744619² = 1652506242910322, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 28744621, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_1784858 and since 28744619 and 1784858 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (28744669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14372309 + 14372310.

It is an arithmetic number, because the mean of its divisors is an integer number (14372310).

Almost surely, 2^28744619 is an apocalyptic number.

28744619 is a deficient number, since it is larger than the sum of its proper divisors (1).

28744619 is an equidigital number, since it uses as much as digits as its factorization.

28744619 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768, while the sum is 41.

The square root of 28744619 is about 5361.4008430633. The cubic root of 28744619 is about 306.3271701126.

The spelling of 28744619 in words is "twenty-eight million, seven hundred forty-four thousand, six hundred nineteen".