117847840 has 48 divisors (see below), whose sum is σ = 303730560. Its totient is φ = 42853120.

The previous prime is 117847831. The next prime is 117847843. The reversal of 117847840 is 48748711.

It is a super-2 number, since 2×117847840² = 27776226785331200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 117847793 and 117847802.

It is not an unprimeable number, because it can be changed into a prime (117847843) by changing a digit.

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, 31720 + ... + 35239.

It is an arithmetic number, because the mean of its divisors is an integer number (6327720).

Almost surely, 2^117847840 is an apocalyptic number.

117847840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

117847840 is an abundant number, since it is smaller than the sum of its proper divisors (185882720).

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

117847840 is a wasteful number, since it uses less digits than its factorization.

117847840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66985 (or 66977 counting only the distinct ones).

The product of its (nonzero) digits is 50176, while the sum is 40.

The square root of 117847840 is about 10855.7745002372. The cubic root of 117847840 is about 490.2758962716.

The spelling of 117847840 in words is "one hundred seventeen million, eight hundred forty-seven thousand, eight hundred forty".