117831000 has 256 divisors, whose sum is σ = 436101120. Its totient is φ = 25920000.

The previous prime is 117830987. The next prime is 117831011. The reversal of 117831000 is 138711.

It is a super-2 number, since 2×117831000² = 27768289122000000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 650910 + ... + 651090.

It is an arithmetic number, because the mean of its divisors is an integer number (1703520).

Almost surely, 2^117831000 is an apocalyptic number.

117831000 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 117831000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (218050560).

117831000 is an abundant number, since it is smaller than the sum of its proper divisors (318270120).

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

117831000 is a wasteful number, since it uses less digits than its factorization.

117831000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243 (or 229 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 21.

The square root of 117831000 is about 10854.9988484569. The cubic root of 117831000 is about 490.2525423168.

Adding to 117831000 its reverse (138711), we get a palindrome (117969711).

The spelling of 117831000 in words is "one hundred seventeen million, eight hundred thirty-one thousand".