1890642 has 16 divisors (see below), whose sum is σ = 4072320. Its totient is φ = 581712.

The previous prime is 1890641. The next prime is 1890643. The reversal of 1890642 is 2460981.

It is an interprime number because it is at equal distance from previous prime (1890641) and next prime (1890643).

It is not an unprimeable number, because it can be changed into a prime (1890641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12042 + ... + 12197.

It is an arithmetic number, because the mean of its divisors is an integer number (254520).

2^1890642 is an apocalyptic number.

1890642 is an abundant number, since it is smaller than the sum of its proper divisors (2181678).

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

1890642 is a wasteful number, since it uses less digits than its factorization.

1890642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24257.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 1890642 is about 1375.0061818043. The cubic root of 1890642 is about 123.6525566960.

The spelling of 1890642 in words is "one million, eight hundred ninety thousand, six hundred forty-two".