1681128924 has 24 divisors (see below), whose sum is σ = 3931119360. Its totient is φ = 559164144.

The previous prime is 1681128923. The next prime is 1681128931. The reversal of 1681128924 is 4298211861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1681128923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145734 + ... + 156845.

It is an arithmetic number, because the mean of its divisors is an integer number (163796640).

Almost surely, 2^1681128924 is an apocalyptic number.

It is an amenable number.

1681128924 is an abundant number, since it is smaller than the sum of its proper divisors (2249990436).

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

1681128924 is a wasteful number, since it uses less digits than its factorization.

1681128924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303049 (or 303047 counting only the distinct ones).

The product of its digits is 55296, while the sum is 42.

The square root of 1681128924 is about 41001.5722137579. The cubic root of 1681128924 is about 1189.0506101424.

The spelling of 1681128924 in words is "one billion, six hundred eighty-one million, one hundred twenty-eight thousand, nine hundred twenty-four".