117278642 has 32 divisors (see below), whose sum is σ = 196729344. Its totient is φ = 52070400.

The previous prime is 117278617. The next prime is 117278647. The reversal of 117278642 is 246872711.

It is a junction number, because it is equal to n+sod(n) for n = 117278596 and 117278605.

It is not an unprimeable number, because it can be changed into a prime (117278647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 182642 + ... + 183282.

It is an arithmetic number, because the mean of its divisors is an integer number (6147792).

Almost surely, 2^117278642 is an apocalyptic number.

117278642 is a deficient number, since it is larger than the sum of its proper divisors (79450702).

117278642 is a wasteful number, since it uses less digits than its factorization.

117278642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 914.

The product of its digits is 37632, while the sum is 38.

The square root of 117278642 is about 10829.5263977701. The cubic root of 117278642 is about 489.4852876454.

The spelling of 117278642 in words is "one hundred seventeen million, two hundred seventy-eight thousand, six hundred forty-two".