1689638190 has 32 divisors (see below), whose sum is σ = 4231443456. Its totient is φ = 430980000.

The previous prime is 1689638183. The next prime is 1689638201. The reversal of 1689638190 is 918369861.

It is a super-2 number, since 2×1689638190² = 5709754426212952200, 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 (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1223686 + ... + 1225065.

It is an arithmetic number, because the mean of its divisors is an integer number (132232608).

Almost surely, 2^1689638190 is an apocalyptic number.

1689638190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1689638190 is an abundant number, since it is smaller than the sum of its proper divisors (2541805266).

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

1689638190 is a wasteful number, since it uses less digits than its factorization.

1689638190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2448784.

The product of its (nonzero) digits is 559872, while the sum is 51.

The square root of 1689638190 is about 41105.2087940203. The cubic root of 1689638190 is about 1191.0534160145.

The spelling of 1689638190 in words is "one billion, six hundred eighty-nine million, six hundred thirty-eight thousand, one hundred ninety".