1683639426 has 32 divisors (see below), whose sum is σ = 3872845440. Its totient is φ = 477974016.

The previous prime is 1683639413. The next prime is 1683639439. The reversal of 1683639426 is 6249363861.

It is an interprime number because it is at equal distance from previous prime (1683639413) and next prime (1683639439).

It is a Curzon 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, 121071 + ... + 134258.

It is an arithmetic number, because the mean of its divisors is an integer number (121026420).

Almost surely, 2^1683639426 is an apocalyptic number.

1683639426 is an abundant number, since it is smaller than the sum of its proper divisors (2189206014).

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

1683639426 is a wasteful number, since it uses less digits than its factorization.

1683639426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255498.

The product of its digits is 1119744, while the sum is 48.

The square root of 1683639426 is about 41032.1754967976. The cubic root of 1683639426 is about 1189.6422025323.

The spelling of 1683639426 in words is "one billion, six hundred eighty-three million, six hundred thirty-nine thousand, four hundred twenty-six".