117777620 has 12 divisors (see below), whose sum is σ = 247333044. Its totient is φ = 47111040.

The previous prime is 117777601. The next prime is 117777631. The reversal of 117777620 is 26777711.

It can be written as a sum of positive squares in 2 ways, for example, as 78889924 + 38887696 = 8882^2 + 6236^2 .

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 2944421 + ... + 2944460.

It is an arithmetic number, because the mean of its divisors is an integer number (20611087).

Almost surely, 2^117777620 is an apocalyptic number.

117777620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

117777620 is an abundant number, since it is smaller than the sum of its proper divisors (129555424).

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

117777620 is a wasteful number, since it uses less digits than its factorization.

117777620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5888890 (or 5888888 counting only the distinct ones).

The product of its (nonzero) digits is 28812, while the sum is 38.

The square root of 117777620 is about 10852.5397949052. The cubic root of 117777620 is about 490.1784994545.

Subtracting from 117777620 its reverse (26777711), we obtain a palindrome (90999909).

The spelling of 117777620 in words is "one hundred seventeen million, seven hundred seventy-seven thousand, six hundred twenty".