3123128 has 8 divisors (see below), whose sum is σ = 5855880. Its totient is φ = 1561560.

The previous prime is 3123091. The next prime is 3123137. The reversal of 3123128 is 8213213.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195188 + ... + 195203.

It is an arithmetic number, because the mean of its divisors is an integer number (731985).

Almost surely, 2^3123128 is an apocalyptic number.

It is an amenable number.

3123128 is a deficient number, since it is larger than the sum of its proper divisors (2732752).

3123128 is a wasteful number, since it uses less digits than its factorization.

3123128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390397 (or 390393 counting only the distinct ones).

The product of its digits is 288, while the sum is 20.

The square root of 3123128 is about 1767.2373920897. The cubic root of 3123128 is about 146.1716876863.

The spelling of 3123128 in words is "three million, one hundred twenty-three thousand, one hundred twenty-eight".