28097019 has 6 divisors (see below), whose sum is σ = 40584596. Its totient is φ = 18731340.

The previous prime is 28096993. The next prime is 28097021. The reversal of 28097019 is 91079082.

It is a happy number.

It is not a de Polignac number, because 28097019 - 2⁵ = 28096987 is a prime.

It is a super-2 number, since 2×28097019² = 1578884953372722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28097059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1560937 + ... + 1560954.

Almost surely, 2^28097019 is an apocalyptic number.

28097019 is a deficient number, since it is larger than the sum of its proper divisors (12487577).

28097019 is a wasteful number, since it uses less digits than its factorization.

28097019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3121897 (or 3121894 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 28097019 is about 5300.6621284515. The cubic root of 28097019 is about 304.0092152966.

The spelling of 28097019 in words is "twenty-eight million, ninety-seven thousand, nineteen".