168888742 has 16 divisors (see below), whose sum is σ = 278902800. Its totient is φ = 76062240.

The previous prime is 168888689. The next prime is 168888743. The reversal of 168888742 is 247888861.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 168888742.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168888743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32817 + ... + 37612.

It is an arithmetic number, because the mean of its divisors is an integer number (17431425).

Almost surely, 2^168888742 is an apocalyptic number.

168888742 is a deficient number, since it is larger than the sum of its proper divisors (110014058).

168888742 is a wasteful number, since it uses less digits than its factorization.

168888742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70551.

The product of its digits is 1376256, while the sum is 52.

The square root of 168888742 is about 12995.7201416466. The cubic root of 168888742 is about 552.7561292058.

The spelling of 168888742 in words is "one hundred sixty-eight million, eight hundred eighty-eight thousand, seven hundred forty-two".