1681340532 has 24 divisors (see below), whose sum is σ = 4029159456. Its totient is φ = 545299488.

The previous prime is 1681340519. The next prime is 1681340539. The reversal of 1681340532 is 2350431861.

It is a junction number, because it is equal to n+sod(n) for n = 1681340493 and 1681340502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1681340539) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1892958 + ... + 1893845.

It is an arithmetic number, because the mean of its divisors is an integer number (167881644).

Almost surely, 2^1681340532 is an apocalyptic number.

1681340532 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1681340532 is an abundant number, since it is smaller than the sum of its proper divisors (2347818924).

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

1681340532 is a wasteful number, since it uses less digits than its factorization.

1681340532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3786847 (or 3786845 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 1681340532 is about 41004.1526189726. The cubic root of 1681340532 is about 1189.1004976637.

The spelling of 1681340532 in words is "one billion, six hundred eighty-one million, three hundred forty thousand, five hundred thirty-two".