117664240 has 40 divisors (see below), whose sum is σ = 278741088. Its totient is φ = 46176000.

The previous prime is 117664193. The next prime is 117664243. The reversal of 117664240 is 42466711.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117664243) 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 7 ways as a sum of consecutive naturals, for example, 9636 + ... + 18115.

Almost surely, 2^117664240 is an apocalyptic number.

117664240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

117664240 is an abundant number, since it is smaller than the sum of its proper divisors (161076848).

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

117664240 is a wasteful number, since it uses less digits than its factorization.

117664240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27817 (or 27811 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 117664240 is about 10847.3148751200. The cubic root of 117664240 is about 490.0211569374.

The spelling of 117664240 in words is "one hundred seventeen million, six hundred sixty-four thousand, two hundred forty".