1890012 has 24 divisors (see below), whose sum is σ = 4435200. Its totient is φ = 626416.

The previous prime is 1889999. The next prime is 1890019. The reversal of 1890012 is 2100981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1890019) 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 in 7 ways as a sum of consecutive naturals, for example, 2539 + ... + 3197.

It is an arithmetic number, because the mean of its divisors is an integer number (184800).

2^1890012 is an apocalyptic number.

1890012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1890012 is an abundant number, since it is smaller than the sum of its proper divisors (2545188).

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

1890012 is a wasteful number, since it uses less digits than its factorization.

1890012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 905 (or 903 counting only the distinct ones).

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

The square root of 1890012 is about 1374.7770728376. Note that the first 3 decimals coincide. The cubic root of 1890012 is about 123.6388206626.

Adding to 1890012 its reverse (2100981), we get a palindrome (3990993).

The spelling of 1890012 in words is "one million, eight hundred ninety thousand, twelve".