1913128 has 32 divisors (see below), whose sum is σ = 4147200. Its totient is φ = 810432.

The previous prime is 1913123. The next prime is 1913147. The reversal of 1913128 is 8213191.

It is not an unprimeable number, because it can be changed into a prime (1913123) 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, 6978 + ... + 7246.

It is an arithmetic number, because the mean of its divisors is an integer number (129600).

2^1913128 is an apocalyptic number.

It is an amenable number.

1913128 is an abundant number, since it is smaller than the sum of its proper divisors (2234072).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1913128 is a wasteful number, since it uses less digits than its factorization.

1913128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409 (or 405 counting only the distinct ones).

The product of its digits is 432, while the sum is 25.

The square root of 1913128 is about 1383.1587038370. The cubic root of 1913128 is about 124.1408389343.

The spelling of 1913128 in words is "one million, nine hundred thirteen thousand, one hundred twenty-eight".