1690000690 has 24 divisors (see below), whose sum is σ = 3538655532. Its totient is φ = 579428640.

The previous prime is 1690000687. The next prime is 1690000727. The reversal of 1690000690 is 960000961.

It can be written as a sum of positive squares in 2 ways, for example, as 1686662761 + 3337929 = 41069^2 + 1827^2 .

It is a super-2 number, since 2×1690000690² = 5712204664400952200, which contains 22 as substring.

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 11 ways as a sum of consecutive naturals, for example, 1724001 + ... + 1724980.

Almost surely, 2^1690000690 is an apocalyptic number.

1690000690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1690000690 is an abundant number, since it is smaller than the sum of its proper divisors (1848654842).

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

1690000690 is a wasteful number, since it uses less digits than its factorization.

1690000690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3449002 (or 3448995 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 1690000690 is about 41109.6179743865. The cubic root of 1690000690 is about 1191.1385873040.

The spelling of 1690000690 in words is "one billion, six hundred ninety million, six hundred ninety", and thus it is an aban number.