1690333426 has 16 divisors (see below), whose sum is σ = 2686539960. Its totient is φ = 794890240.

The previous prime is 1690333361. The next prime is 1690333433. The reversal of 1690333426 is 6243330961.

It can be written as a sum of positive squares in 4 ways, for example, as 1234468225 + 455865201 = 35135^2 + 21351^2 .

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 7 ways as a sum of consecutive naturals, for example, 33570 + ... + 67138.

Almost surely, 2^1690333426 is an apocalyptic number.

1690333426 is a deficient number, since it is larger than the sum of its proper divisors (996206534).

1690333426 is a wasteful number, since it uses less digits than its factorization.

1690333426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35069.

The product of its (nonzero) digits is 69984, while the sum is 37.

The square root of 1690333426 is about 41113.6647113828. The cubic root of 1690333426 is about 1191.2167546648.

The spelling of 1690333426 in words is "one billion, six hundred ninety million, three hundred thirty-three thousand, four hundred twenty-six".