1990190 has 32 divisors (see below), whose sum is σ = 3965760. Its totient is φ = 715264.

The previous prime is 1990189. The next prime is 1990211. The reversal of 1990190 is 910991.

It is a super-2 number, since 2×1990190² = 7921712472200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 3656 + ... + 4164.

It is an arithmetic number, because the mean of its divisors is an integer number (123930).

2^1990190 is an apocalyptic number.

1990190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1990190 is a deficient number, since it is larger than the sum of its proper divisors (1975570).

1990190 is a wasteful number, since it uses less digits than its factorization.

1990190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556.

The product of its (nonzero) digits is 729, while the sum is 29.

The square root of 1990190 is about 1410.7409400737. The cubic root of 1990190 is about 125.7857701718.

It can be divided in two parts, 19901 and 90, that added together give a palindrome (19991).

The spelling of 1990190 in words is "one million, nine hundred ninety thousand, one hundred ninety".