28119869 has 4 divisors (see below), whose sum is σ = 29342496. Its totient is φ = 26897244.

The previous prime is 28119863. The next prime is 28119899. The reversal of 28119869 is 96891182.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28119869 - 2⁸ = 28119613 is a prime.

It is a super-2 number, since 2×28119869² = 1581454065154322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28119863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 611279 + ... + 611324.

It is an arithmetic number, because the mean of its divisors is an integer number (7335624).

Almost surely, 2^28119869 is an apocalyptic number.

It is an amenable number.

28119869 is a deficient number, since it is larger than the sum of its proper divisors (1222627).

28119869 is a wasteful number, since it uses less digits than its factorization.

28119869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1222626.

The product of its digits is 62208, while the sum is 44.

The square root of 28119869 is about 5302.8170815143. The cubic root of 28119869 is about 304.0916051556.

The spelling of 28119869 in words is "twenty-eight million, one hundred nineteen thousand, eight hundred sixty-nine".