162640 has 40 divisors (see below), whose sum is σ = 401760. Its totient is φ = 61056.

The previous prime is 162629. The next prime is 162641. The reversal of 162640 is 46261.

162640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (162641) 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, 1467 + ... + 1573.

It is an arithmetic number, because the mean of its divisors is an integer number (10044).

2¹⁶²⁶⁴⁰ is an apocalyptic number.

162640 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 162640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (200880).

162640 is an abundant number, since it is smaller than the sum of its proper divisors (239120).

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

162640 is a wasteful number, since it uses less digits than its factorization.

162640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139 (or 133 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 162640 is about 403.2864986582. The cubic root of 162640 is about 54.5853109372.

The spelling of 162640 in words is "one hundred sixty-two thousand, six hundred forty".