1990892 has 12 divisors (see below), whose sum is σ = 3550176. Its totient is φ = 976560.

The previous prime is 1990889. The next prime is 1990907. The reversal of 1990892 is 2980991.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 4484 + ... + 4907.

It is an arithmetic number, because the mean of its divisors is an integer number (295848).

2^1990892 is an apocalyptic number.

It is an amenable number.

1990892 is a deficient number, since it is larger than the sum of its proper divisors (1559284).

1990892 is a wasteful number, since it uses less digits than its factorization.

1990892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9448 (or 9446 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 38.

The square root of 1990892 is about 1410.9897235629. The cubic root of 1990892 is about 125.8005579107.

Subtracting 1990892 from its reverse (2980991), we obtain a palindrome (990099).

It can be divided in two parts, 1990 and 892, that added together give a palindrome (2882).

The spelling of 1990892 in words is "one million, nine hundred ninety thousand, eight hundred ninety-two".