3128255 has 32 divisors (see below), whose sum is σ = 4536000. Its totient is φ = 2045952.

The previous prime is 3128249. The next prime is 3128291. The reversal of 3128255 is 5528213.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3128255 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20921 + ... + 21069.

It is an arithmetic number, because the mean of its divisors is an integer number (141750).

Almost surely, 2^3128255 is an apocalyptic number.

3128255 is a deficient number, since it is larger than the sum of its proper divisors (1407745).

3128255 is a wasteful number, since it uses less digits than its factorization.

3128255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203.

The product of its digits is 2400, while the sum is 26.

The square root of 3128255 is about 1768.6873663822. The cubic root of 3128255 is about 146.2516302446.

The spelling of 3128255 in words is "three million, one hundred twenty-eight thousand, two hundred fifty-five".