28025019 has 48 divisors (see below), whose sum is σ = 47623680. Its totient is φ = 15698880.

The previous prime is 28025009. The next prime is 28025029. The reversal of 28025019 is 91052082.

It is an interprime number because it is at equal distance from previous prime (28025009) and next prime (28025029).

It is not a de Polignac number, because 28025019 - 2⁵ = 28024987 is a prime.

It is a super-2 number, since 2×28025019² = 1570803379900722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28024983 and 28025001.

It is not an unprimeable number, because it can be changed into a prime (28025009) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 88249 + ... + 88565.

It is an arithmetic number, because the mean of its divisors is an integer number (992160).

Almost surely, 2^28025019 is an apocalyptic number.

28025019 is a deficient number, since it is larger than the sum of its proper divisors (19598661).

28025019 is a wasteful number, since it uses less digits than its factorization.

28025019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400 (or 397 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 28025019 is about 5293.8661675566. The cubic root of 28025019 is about 303.7493136193.

The spelling of 28025019 in words is "twenty-eight million, twenty-five thousand, nineteen".