4028555 has 4 divisors (see below), whose sum is σ = 4834272. Its totient is φ = 3222840.

The previous prime is 4028539. The next prime is 4028561. The reversal of 4028555 is 5558204.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 4028555 - 2⁴ = 4028539 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 402851 + ... + 402860.

It is an arithmetic number, because the mean of its divisors is an integer number (1208568).

Almost surely, 2^4028555 is an apocalyptic number.

4028555 is a deficient number, since it is larger than the sum of its proper divisors (805717).

4028555 is an equidigital number, since it uses as much as digits as its factorization.

4028555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 805716.

The product of its (nonzero) digits is 8000, while the sum is 29.

The square root of 4028555 is about 2007.1260548356. The cubic root of 4028555 is about 159.1169452008.

The spelling of 4028555 in words is "four million, twenty-eight thousand, five hundred fifty-five".