1920138 has 32 divisors (see below), whose sum is σ = 4285440. Its totient is φ = 568560.

The previous prime is 1920101. The next prime is 1920143. The reversal of 1920138 is 8310291.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2793 + ... + 3411.

It is an arithmetic number, because the mean of its divisors is an integer number (133920).

2^1920138 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1920138, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2142720).

1920138 is an abundant number, since it is smaller than the sum of its proper divisors (2365302).

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

1920138 is a wasteful number, since it uses less digits than its factorization.

1920138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 682.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 1920138 is about 1385.6904416211. The cubic root of 1920138 is about 124.2922779313.

The spelling of 1920138 in words is "one million, nine hundred twenty thousand, one hundred thirty-eight".