1900128 has 24 divisors (see below), whose sum is σ = 4988088. Its totient is φ = 633344.

The previous prime is 1900121. The next prime is 1900147. The reversal of 1900128 is 8210091.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×1900128² = 7220972832768, which contains 22 as substring.

It is a nialpdrome in base 12.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1900121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9801 + ... + 9992.

It is an arithmetic number, because the mean of its divisors is an integer number (207837).

2^1900128 is an apocalyptic number.

It is an amenable number.

1900128 is an abundant number, since it is smaller than the sum of its proper divisors (3087960).

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

1900128 is a wasteful number, since it uses less digits than its factorization.

1900128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19806 (or 19798 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 1900128 is about 1378.4513049071. The cubic root of 1900128 is about 123.8590142335.

The spelling of 1900128 in words is "one million, nine hundred thousand, one hundred twenty-eight".