117890786 has 16 divisors (see below), whose sum is σ = 190668408. Its totient is φ = 54345600.

The previous prime is 117890761. The next prime is 117890789. The reversal of 117890786 is 687098711.

It can be written as a sum of positive squares in 4 ways, for example, as 79834225 + 38056561 = 8935^2 + 6169^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 117890786.

It is not an unprimeable number, because it can be changed into a prime (117890789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24326 + ... + 28766.

Almost surely, 2^117890786 is an apocalyptic number.

117890786 is a deficient number, since it is larger than the sum of its proper divisors (72777622).

117890786 is a wasteful number, since it uses less digits than its factorization.

117890786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5477.

The product of its (nonzero) digits is 169344, while the sum is 47.

The square root of 117890786 is about 10857.7523456745. The cubic root of 117890786 is about 490.3354443337.

The spelling of 117890786 in words is "one hundred seventeen million, eight hundred ninety thousand, seven hundred eighty-six".