28030555 has 8 divisors (see below), whose sum is σ = 38441952. Its totient is φ = 19220928.

The previous prime is 28030553. The next prime is 28030591. The reversal of 28030555 is 55503082.

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 28030555 - 2¹ = 28030553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28030553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 400402 + ... + 400471.

It is an arithmetic number, because the mean of its divisors is an integer number (4805244).

Almost surely, 2^28030555 is an apocalyptic number.

28030555 is a deficient number, since it is larger than the sum of its proper divisors (10411397).

28030555 is an equidigital number, since it uses as much as digits as its factorization.

28030555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800885.

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 28030555 is about 5294.3890110191. The cubic root of 28030555 is about 303.7693129574.

The spelling of 28030555 in words is "twenty-eight million, thirty thousand, five hundred fifty-five".