168111390 has 16 divisors (see below), whose sum is σ = 403467408. Its totient is φ = 44829696.

The previous prime is 168111353. The next prime is 168111401. The reversal of 168111390 is 93111861.

It is a super-2 number, since 2×168111390² = 56522878895464200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 5603713 = 168111390 / (1 + 6 + 8 + 1 + 1 + 1 + 3 + 9 + 0).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2801827 + ... + 2801886.

It is an arithmetic number, because the mean of its divisors is an integer number (25216713).

Almost surely, 2^168111390 is an apocalyptic number.

168111390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

168111390 is an abundant number, since it is smaller than the sum of its proper divisors (235356018).

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

168111390 is a wasteful number, since it uses less digits than its factorization.

168111390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5603723.

The product of its (nonzero) digits is 1296, while the sum is 30.

The square root of 168111390 is about 12965.7776473299. Note that the first 3 decimals coincide. The cubic root of 168111390 is about 551.9067593510.

The spelling of 168111390 in words is "one hundred sixty-eight million, one hundred eleven thousand, three hundred ninety".