162990 has 24 divisors (see below), whose sum is σ = 424008. Its totient is φ = 43440.

The previous prime is 162989. The next prime is 162997. The reversal of 162990 is 99261.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (162997) 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 11 ways as a sum of consecutive naturals, for example, 816 + ... + 995.

It is an arithmetic number, because the mean of its divisors is an integer number (17667).

2¹⁶²⁹⁹⁰ is an apocalyptic number.

162990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

162990 is an abundant number, since it is smaller than the sum of its proper divisors (261018).

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

162990 is a wasteful number, since it uses less digits than its factorization.

162990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1824 (or 1821 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 162990 is about 403.7202001387. The cubic root of 162990 is about 54.6244386029.

The spelling of 162990 in words is "one hundred sixty-two thousand, nine hundred ninety".