169142868 has 36 divisors (see below), whose sum is σ = 428095668. Its totient is φ = 56309760.

The previous prime is 169142867. The next prime is 169142879. The reversal of 169142868 is 868241961.

169142868 is a `hidden beast` number, since 169 + 1 + 428 + 68 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 81757764 + 87385104 = 9042^2 + 9348^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (169142861) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31380 + ... + 36372.

Almost surely, 2^169142868 is an apocalyptic number.

169142868 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

169142868 is an abundant number, since it is smaller than the sum of its proper divisors (258952800).

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

169142868 is a wasteful number, since it uses less digits than its factorization.

169142868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5944 (or 5939 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 169142868 is about 13005.4937622529. The cubic root of 169142868 is about 553.0332333446.

The spelling of 169142868 in words is "one hundred sixty-nine million, one hundred forty-two thousand, eight hundred sixty-eight".