1831690426 has 8 divisors (see below), whose sum is σ = 2765036340. Its totient is φ = 910011648.

The previous prime is 1831690423. The next prime is 1831690463. The reversal of 1831690426 is 6240961381.

It can be written as a sum of positive squares in 2 ways, for example, as 1814674801 + 17015625 = 42599^2 + 4125^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1831690426² = 6710179633400122952, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1831690423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2916391 + ... + 2917018.

Almost surely, 2^1831690426 is an apocalyptic number.

1831690426 is a deficient number, since it is larger than the sum of its proper divisors (933345914).

1831690426 is a wasteful number, since it uses less digits than its factorization.

1831690426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5833568.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 1831690426 is about 42798.2526045165. The cubic root of 1831690426 is about 1223.5377083740.

The spelling of 1831690426 in words is "one billion, eight hundred thirty-one million, six hundred ninety thousand, four hundred twenty-six".