117397278 has 48 divisors (see below), whose sum is σ = 264513600. Its totient is φ = 37584960.

The previous prime is 117397271. The next prime is 117397289. The reversal of 117397278 is 872793711.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117397271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 124288 + ... + 125228.

It is an arithmetic number, because the mean of its divisors is an integer number (5510700).

Almost surely, 2^117397278 is an apocalyptic number.

117397278 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 117397278, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132256800).

117397278 is an abundant number, since it is smaller than the sum of its proper divisors (147116322).

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

117397278 is a wasteful number, since it uses less digits than its factorization.

117397278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1217 (or 1214 counting only the distinct ones).

The product of its digits is 148176, while the sum is 45.

The square root of 117397278 is about 10835.0024457773. The cubic root of 117397278 is about 489.6502821852.

The spelling of 117397278 in words is "one hundred seventeen million, three hundred ninety-seven thousand, two hundred seventy-eight".