162440989 has 8 divisors (see below), whose sum is σ = 167532728. Its totient is φ = 157386240.

The previous prime is 162440981. The next prime is 162441007. The reversal of 162440989 is 989044261.

It can be written as a sum of positive squares in 4 ways, for example, as 53071225 + 109369764 = 7285^2 + 10458^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 162440989 - 2³ = 162440981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (162440981) 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, 192 + ... + 18025.

It is an arithmetic number, because the mean of its divisors is an integer number (20941591).

Almost surely, 2^162440989 is an apocalyptic number.

It is an amenable number.

162440989 is a deficient number, since it is larger than the sum of its proper divisors (5091739).

162440989 is a wasteful number, since it uses less digits than its factorization.

162440989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18495.

The product of its (nonzero) digits is 124416, while the sum is 43.

The square root of 162440989 is about 12745.2339719599. The cubic root of 162440989 is about 545.6303779582.

The spelling of 162440989 in words is "one hundred sixty-two million, four hundred forty thousand, nine hundred eighty-nine".