117746640 has 120 divisors (see below), whose sum is σ = 431409888. Its totient is φ = 28542720.

The previous prime is 117746639. The next prime is 117746647. The reversal of 117746640 is 46647711.

117746640 is a `hidden beast` number, since 1 + 1 + 7 + 7 + 4 + 6 + 640 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 117746595 and 117746604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117746647) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 487 + ... + 15353.

Almost surely, 2^117746640 is an apocalyptic number.

117746640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 117746640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (215704944).

117746640 is an abundant number, since it is smaller than the sum of its proper divisors (313663248).

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

117746640 is a wasteful number, since it uses less digits than its factorization.

117746640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14897 (or 14888 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 117746640 is about 10851.1123853732. The cubic root of 117746640 is about 490.1355171472.

The spelling of 117746640 in words is "one hundred seventeen million, seven hundred forty-six thousand, six hundred forty".