161862738 has 8 divisors (see below), whose sum is σ = 323725488. Its totient is φ = 53954244.

The previous prime is 161862737. The next prime is 161862751. The reversal of 161862738 is 837268161.

161862738 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

161862738 is an admirable number.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 161862738.

It is not an unprimeable number, because it can be changed into a prime (161862733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13488556 + ... + 13488567.

It is an arithmetic number, because the mean of its divisors is an integer number (40465686).

Almost surely, 2^161862738 is an apocalyptic number.

161862738 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

161862738 is a wasteful number, since it uses less digits than its factorization.

161862738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26977128.

The product of its digits is 96768, while the sum is 42.

The square root of 161862738 is about 12722.5287580732. The cubic root of 161862738 is about 544.9821703900.

The spelling of 161862738 in words is "one hundred sixty-one million, eight hundred sixty-two thousand, seven hundred thirty-eight".