117657840 has 40 divisors (see below), whose sum is σ = 364740048. Its totient is φ = 31375360.

The previous prime is 117657797. The next prime is 117657851. The reversal of 117657840 is 48756711.

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

It is a super-4 number, since 4×117657840⁴ (a number of 33 digits) contains 4444 as substring.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 244881 + ... + 245360.

Almost surely, 2^117657840 is an apocalyptic number.

117657840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

117657840 is an abundant number, since it is smaller than the sum of its proper divisors (247082208).

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

117657840 is a wasteful number, since it uses less digits than its factorization.

117657840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490257 (or 490251 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 39.

The square root of 117657840 is about 10847.0198672262. The cubic root of 117657840 is about 490.0122723568.

The spelling of 117657840 in words is "one hundred seventeen million, six hundred fifty-seven thousand, eight hundred forty".