1681266928 has 30 divisors (see below), whose sum is σ = 3580512152. Its totient is φ = 764211360.

The previous prime is 1681266913. The next prime is 1681266931. The reversal of 1681266928 is 8296621861.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 432276 + ... + 436147.

Almost surely, 2^1681266928 is an apocalyptic number.

It is an amenable number.

1681266928 is an abundant number, since it is smaller than the sum of its proper divisors (1899245224).

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

1681266928 is a wasteful number, since it uses less digits than its factorization.

1681266928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868453 (or 868436 counting only the distinct ones).

The product of its digits is 497664, while the sum is 49.

The square root of 1681266928 is about 41003.2550902974. The cubic root of 1681266928 is about 1189.0831456702.

The spelling of 1681266928 in words is "one billion, six hundred eighty-one million, two hundred sixty-six thousand, nine hundred twenty-eight".