117289928 has 36 divisors (see below), whose sum is σ = 256292235. Its totient is φ = 50175216.

The previous prime is 117289927. The next prime is 117289937. The reversal of 117289928 is 829982711.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 58644964 + 58644964 = 7658^2 + 7658^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=7658.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117289927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 214151 + ... + 214697.

Almost surely, 2^117289928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 117289928

117289928 is an abundant number, since it is smaller than the sum of its proper divisors (139002307).

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

117289928 is an frugal number, since it uses more digits than its factorization.

117289928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1114 (or 556 counting only the distinct ones).

The product of its digits is 145152, while the sum is 47.

The square root of 117289928 is about 10830.0474606532. The cubic root of 117289928 is about 489.5009885826.

The spelling of 117289928 in words is "one hundred seventeen million, two hundred eighty-nine thousand, nine hundred twenty-eight".