162921138 has 16 divisors (see below), whose sum is σ = 334649280. Its totient is φ = 52839216.

The previous prime is 162921137. The next prime is 162921169. The reversal of 162921138 is 831129261.

It is a junction number, because it is equal to n+sod(n) for n = 162921099 and 162921108.

It is not an unprimeable number, because it can be changed into a prime (162921131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 366718 + ... + 367161.

It is an arithmetic number, because the mean of its divisors is an integer number (20915580).

Almost surely, 2^162921138 is an apocalyptic number.

162921138 is an abundant number, since it is smaller than the sum of its proper divisors (171728142).

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

162921138 is a wasteful number, since it uses less digits than its factorization.

162921138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 733921.

The product of its digits is 5184, while the sum is 33.

The square root of 162921138 is about 12764.0564868697. The cubic root of 162921138 is about 546.1674471997.

The spelling of 162921138 in words is "one hundred sixty-two million, nine hundred twenty-one thousand, one hundred thirty-eight".