28380255 has 8 divisors (see below), whose sum is σ = 45408432. Its totient is φ = 15136128.

The previous prime is 28380251. The next prime is 28380263. The reversal of 28380255 is 55208382.

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

It is not a de Polignac number, because 28380255 - 2² = 28380251 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28380251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 945994 + ... + 946023.

It is an arithmetic number, because the mean of its divisors is an integer number (5676054).

Almost surely, 2^28380255 is an apocalyptic number.

28380255 is a deficient number, since it is larger than the sum of its proper divisors (17028177).

28380255 is a wasteful number, since it uses less digits than its factorization.

28380255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1892025.

The product of its (nonzero) digits is 19200, while the sum is 33.

The square root of 28380255 is about 5327.3121740705. The cubic root of 28380255 is about 305.0273378703.

The spelling of 28380255 in words is "twenty-eight million, three hundred eighty thousand, two hundred fifty-five".