28208955 has 8 divisors (see below), whose sum is σ = 45134352. Its totient is φ = 15044768.

The previous prime is 28208951. The next prime is 28208963. The reversal of 28208955 is 55980282.

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

It is a cyclic number.

It is not a de Polignac number, because 28208955 - 2² = 28208951 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28208951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 940284 + ... + 940313.

It is an arithmetic number, because the mean of its divisors is an integer number (5641794).

Almost surely, 2^28208955 is an apocalyptic number.

28208955 is a deficient number, since it is larger than the sum of its proper divisors (16925397).

28208955 is a wasteful number, since it uses less digits than its factorization.

28208955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1880605.

The product of its (nonzero) digits is 57600, while the sum is 39.

The square root of 28208955 is about 5311.2103140433. The cubic root of 28208955 is about 304.4123954942.

The spelling of 28208955 in words is "twenty-eight million, two hundred eight thousand, nine hundred fifty-five".