28380369 has 8 divisors (see below), whose sum is σ = 38863360. Its totient is φ = 18408816.

The previous prime is 28380353. The next prime is 28380377. The reversal of 28380369 is 96308382.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28380369 - 2⁴ = 28380353 is a prime.

It is a super-2 number, since 2×28380369² = 1610890689152322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28380349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127729 + ... + 127950.

It is an arithmetic number, because the mean of its divisors is an integer number (4857920).

Almost surely, 2^28380369 is an apocalyptic number.

It is an amenable number.

28380369 is a deficient number, since it is larger than the sum of its proper divisors (10482991).

28380369 is a wasteful number, since it uses less digits than its factorization.

28380369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255719.

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 28380369 is about 5327.3228736393. The cubic root of 28380369 is about 305.0277462888.

The spelling of 28380369 in words is "twenty-eight million, three hundred eighty thousand, three hundred sixty-nine".