117779478 has 32 divisors (see below), whose sum is σ = 244008960. Its totient is φ = 37860480.

The previous prime is 117779477. The next prime is 117779483. The reversal of 117779478 is 874977711.

It is a self number, because there is not a number n which added to its sum of digits gives 117779478.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117779477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61743 + ... + 63621.

It is an arithmetic number, because the mean of its divisors is an integer number (7625280).

Almost surely, 2^117779478 is an apocalyptic number.

117779478 is an abundant number, since it is smaller than the sum of its proper divisors (126229482).

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

117779478 is a wasteful number, since it uses less digits than its factorization.

117779478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2252.

The product of its digits is 691488, while the sum is 51.

The square root of 117779478 is about 10852.6253966494. The cubic root of 117779478 is about 490.1810770434.

The spelling of 117779478 in words is "one hundred seventeen million, seven hundred seventy-nine thousand, four hundred seventy-eight".