28779269 has 4 divisors (see below), whose sum is σ = 28797696. Its totient is φ = 28760844.

The previous prime is 28779227. The next prime is 28779271. The reversal of 28779269 is 96297782.

It is a happy number.

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 28779269 - 2¹⁶ = 28713733 is a prime.

It is a super-2 number, since 2×28779269² = 1656492648348722, 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 (28779209) 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, 6629 + ... + 10074.

It is an arithmetic number, because the mean of its divisors is an integer number (7199424).

Almost surely, 2^28779269 is an apocalyptic number.

It is an amenable number.

28779269 is a deficient number, since it is larger than the sum of its proper divisors (18427).

28779269 is a wasteful number, since it uses less digits than its factorization.

28779269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18426.

The product of its digits is 762048, while the sum is 50.

The square root of 28779269 is about 5364.6313014037. The cubic root of 28779269 is about 306.4502073362.

The spelling of 28779269 in words is "twenty-eight million, seven hundred seventy-nine thousand, two hundred sixty-nine".