117761220 has 36 divisors (see below), whose sum is σ = 357209580. Its totient is φ = 31402944.

The previous prime is 117761213. The next prime is 117761233. The reversal of 117761220 is 22167711.

It can be written as a sum of positive squares in 2 ways, for example, as 80892036 + 36869184 = 8994^2 + 6072^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 326935 + ... + 327294.

Almost surely, 2^117761220 is an apocalyptic number.

117761220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

117761220 is an abundant number, since it is smaller than the sum of its proper divisors (239448360).

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

117761220 is a wasteful number, since it uses less digits than its factorization.

117761220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654244 (or 654239 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 27.

The square root of 117761220 is about 10851.7841851006. The cubic root of 117761220 is about 490.1557466866.

It can be divided in two parts, 11776 and 1220, that added together give a square (12996 = 114²).

The spelling of 117761220 in words is "one hundred seventeen million, seven hundred sixty-one thousand, two hundred twenty".