1904140 has 72 divisors (see below), whose sum is σ = 4883760. Its totient is φ = 620928.

The previous prime is 1904129. The next prime is 1904143. The reversal of 1904140 is 414091.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1904143) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28387 + ... + 28453.

It is an arithmetic number, because the mean of its divisors is an integer number (67830).

2^1904140 is an apocalyptic number.

1904140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1904140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2441880).

1904140 is an abundant number, since it is smaller than the sum of its proper divisors (2979620).

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

1904140 is a wasteful number, since it uses less digits than its factorization.

1904140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119 (or 110 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 1904140 is about 1379.9057938859. The cubic root of 1904140 is about 123.9461264412.

The spelling of 1904140 in words is "one million, nine hundred four thousand, one hundred forty".