1683423640 has 64 divisors (see below), whose sum is σ = 4061404800. Its totient is φ = 625717248.

The previous prime is 1683423631. The next prime is 1683423653. The reversal of 1683423640 is 463243861.

It is a self number, because there is not a number n which added to its sum of digits gives 1683423640.

It is a congruent 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, 38052 + ... + 69388.

It is an arithmetic number, because the mean of its divisors is an integer number (63459450).

Almost surely, 2^1683423640 is an apocalyptic number.

1683423640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1683423640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2030702400).

1683423640 is an abundant number, since it is smaller than the sum of its proper divisors (2377981160).

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

1683423640 is a wasteful number, since it uses less digits than its factorization.

1683423640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31444 (or 31440 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 37.

The square root of 1683423640 is about 41029.5459394812. The cubic root of 1683423640 is about 1189.5913763090.

The spelling of 1683423640 in words is "one billion, six hundred eighty-three million, four hundred twenty-three thousand, six hundred forty".