117851628 has 12 divisors (see below), whose sum is σ = 274987160. Its totient is φ = 39283872.

The previous prime is 117851627. The next prime is 117851659. The reversal of 117851628 is 826158711.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (117851627) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 4910473 + ... + 4910496.

Almost surely, 2^117851628 is an apocalyptic number.

It is an amenable number.

117851628 is an abundant number, since it is smaller than the sum of its proper divisors (157135532).

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

117851628 is a wasteful number, since it uses less digits than its factorization.

117851628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9820976 (or 9820974 counting only the distinct ones).

The product of its digits is 26880, while the sum is 39.

The square root of 117851628 is about 10855.9489681925. The cubic root of 117851628 is about 490.2811492181.

The spelling of 117851628 in words is "one hundred seventeen million, eight hundred fifty-one thousand, six hundred twenty-eight".