162189490 has 8 divisors (see below), whose sum is σ = 291941100. Its totient is φ = 64875792.

The previous prime is 162189451. The next prime is 162189497. The reversal of 162189490 is 94981261.

It can be written as a sum of positive squares in 2 ways, for example, as 157176369 + 5013121 = 12537^2 + 2239^2 .

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

It is not an unprimeable number, because it can be changed into a prime (162189497) 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, 8109465 + ... + 8109484.

Almost surely, 2^162189490 is an apocalyptic number.

162189490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

162189490 is a deficient number, since it is larger than the sum of its proper divisors (129751610).

162189490 is a wasteful number, since it uses less digits than its factorization.

162189490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16218956.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 162189490 is about 12735.3637560927. The cubic root of 162189490 is about 545.3486420574.

The spelling of 162189490 in words is "one hundred sixty-two million, one hundred eighty-nine thousand, four hundred ninety".