1681248732 has 24 divisors (see below), whose sum is σ = 3923606400. Its totient is φ = 560317296.

The previous prime is 1681248731. The next prime is 1681248739. The reversal of 1681248732 is 2378421861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1681248731) 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, 97369 + ... + 113327.

It is an arithmetic number, because the mean of its divisors is an integer number (163483600).

Almost surely, 2^1681248732 is an apocalyptic number.

1681248732 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1681248732 is an abundant number, since it is smaller than the sum of its proper divisors (2242357668).

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

1681248732 is a wasteful number, since it uses less digits than its factorization.

1681248732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24745 (or 24743 counting only the distinct ones).

The product of its digits is 129024, while the sum is 42.

The square root of 1681248732 is about 41003.0332048740. The cubic root of 1681248732 is about 1189.0788559221.

The spelling of 1681248732 in words is "one billion, six hundred eighty-one million, two hundred forty-eight thousand, seven hundred thirty-two".