1890734 has 4 divisors (see below), whose sum is σ = 2836104. Its totient is φ = 945366.

The previous prime is 1890731. The next prime is 1890743. The reversal of 1890734 is 4370981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4370981 = 269 ⋅16249.

It is a self number, because there is not a number n which added to its sum of digits gives 1890734.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1890731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 472682 + ... + 472685.

It is an arithmetic number, because the mean of its divisors is an integer number (709026).

2^1890734 is an apocalyptic number.

1890734 is a deficient number, since it is larger than the sum of its proper divisors (945370).

1890734 is an equidigital number, since it uses as much as digits as its factorization.

1890734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 945369.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 1890734 is about 1375.0396357924. The cubic root of 1890734 is about 123.6545623376.

The spelling of 1890734 in words is "one million, eight hundred ninety thousand, seven hundred thirty-four".