117842928 has 80 divisors (see below), whose sum is σ = 357358080. Its totient is φ = 32755968.

The previous prime is 117842927. The next prime is 117842939. The reversal of 117842928 is 829248711.

It is a super-2 number, since 2×117842928² = 27773911359226368, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 117842928.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117842927) 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, 7693 + ... + 17171.

It is an arithmetic number, because the mean of its divisors is an integer number (4466976).

Almost surely, 2^117842928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 117842928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (178679040).

117842928 is an abundant number, since it is smaller than the sum of its proper divisors (239515152).

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

117842928 is a wasteful number, since it uses less digits than its factorization.

117842928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9534 (or 9528 counting only the distinct ones).

The product of its digits is 64512, while the sum is 42.

The square root of 117842928 is about 10855.5482588398. The cubic root of 117842928 is about 490.2690844690.

The spelling of 117842928 in words is "one hundred seventeen million, eight hundred forty-two thousand, nine hundred twenty-eight".