1900190 has 32 divisors (see below), whose sum is σ = 3676320. Its totient is φ = 705024.

The previous prime is 1900189. The next prime is 1900201. The reversal of 1900190 is 910091.

It is a super-2 number, since 2×1900190² = 7221444072200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13802 + ... + 13938.

It is an arithmetic number, because the mean of its divisors is an integer number (114885).

2^1900190 is an apocalyptic number.

1900190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1900190 is a deficient number, since it is larger than the sum of its proper divisors (1776130).

1900190 is a wasteful number, since it uses less digits than its factorization.

1900190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236.

The product of its (nonzero) digits is 81, while the sum is 20.

The square root of 1900190 is about 1378.4737937299. The cubic root of 1900190 is about 123.8603613665.

Subtracting from 1900190 its reverse (910091), we obtain a palindrome (990099).

It can be divided in two parts, 19001 and 90, that added together give a palindrome (19091).

The spelling of 1900190 in words is "one million, nine hundred thousand, one hundred ninety".