117947640 has 64 divisors (see below), whose sum is σ = 366055200. Its totient is φ = 30367232.

The previous prime is 117947639. The next prime is 117947647. The reversal of 117947640 is 46749711.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117947647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13467 + ... + 20426.

Almost surely, 2^117947640 is an apocalyptic number.

117947640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

117947640 is an abundant number, since it is smaller than the sum of its proper divisors (248107560).

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

117947640 is a wasteful number, since it uses less digits than its factorization.

117947640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33936 (or 33932 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 39.

The square root of 117947640 is about 10860.3701594375. The cubic root of 117947640 is about 490.4142547087.

The spelling of 117947640 in words is "one hundred seventeen million, nine hundred forty-seven thousand, six hundred forty".