117646890 has 32 divisors (see below), whose sum is σ = 283469760. Its totient is φ = 31248384.

The previous prime is 117646889. The next prime is 117646901. The reversal of 117646890 is 98646711.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81 + ... + 15339.

It is an arithmetic number, because the mean of its divisors is an integer number (8858430).

Almost surely, 2^117646890 is an apocalyptic number.

117646890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

117646890 is an abundant number, since it is smaller than the sum of its proper divisors (165822870).

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

117646890 is a wasteful number, since it uses less digits than its factorization.

117646890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15526.

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 117646890 is about 10846.5151085498. The cubic root of 117646890 is about 489.9970706475.

The spelling of 117646890 in words is "one hundred seventeen million, six hundred forty-six thousand, eight hundred ninety".