162161440 has 96 divisors (see below), whose sum is σ = 444576384. Its totient is φ = 54743040.

The previous prime is 162161413. The next prime is 162161443. The reversal of 162161440 is 44161261.

It is not an unprimeable number, because it can be changed into a prime (162161443) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 73960 + ... + 76120.

It is an arithmetic number, because the mean of its divisors is an integer number (4631004).

Almost surely, 2^162161440 is an apocalyptic number.

162161440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 162161440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (222288192).

162161440 is an abundant number, since it is smaller than the sum of its proper divisors (282414944).

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

162161440 is a wasteful number, since it uses less digits than its factorization.

162161440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2250 (or 2242 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 162161440 is about 12734.2624442879. The cubic root of 162161440 is about 545.3172016491.

The spelling of 162161440 in words is "one hundred sixty-two million, one hundred sixty-one thousand, four hundred forty".