28002469 has 4 divisors (see below), whose sum is σ = 30548160. Its totient is φ = 25456780.

The previous prime is 28002461. The next prime is 28002479. The reversal of 28002469 is 96420082.

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 28002469 - 2³ = 28002461 is a prime.

It is a super-2 number, since 2×28002469² = 1568276540191922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28002469.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28002461) 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, 1272829 + ... + 1272850.

It is an arithmetic number, because the mean of its divisors is an integer number (7637040).

Almost surely, 2^28002469 is an apocalyptic number.

It is an amenable number.

28002469 is a deficient number, since it is larger than the sum of its proper divisors (2545691).

28002469 is a wasteful number, since it uses less digits than its factorization.

28002469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2545690.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 28002469 is about 5291.7359155574. The cubic root of 28002469 is about 303.6678223278.

The spelling of 28002469 in words is "twenty-eight million, two thousand, four hundred sixty-nine".