162140720 has 80 divisors (see below), whose sum is σ = 434138880. Its totient is φ = 55164672.

The previous prime is 162140717. The next prime is 162140723. The reversal of 162140720 is 27041261.

It is an interprime number because it is at equal distance from previous prime (162140717) and next prime (162140723).

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×162140720² = 52579226164236800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (162140723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76799 + ... + 78881.

It is an arithmetic number, because the mean of its divisors is an integer number (5426736).

Almost surely, 2^162140720 is an apocalyptic number.

162140720 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 162140720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (217069440).

162140720 is an abundant number, since it is smaller than the sum of its proper divisors (271998160).

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

162140720 is a wasteful number, since it uses less digits than its factorization.

162140720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2242 (or 2236 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 162140720 is about 12733.4488650954. The cubic root of 162140720 is about 545.2939748909.

Adding to 162140720 its reverse (27041261), we get a palindrome (189181981).

The spelling of 162140720 in words is "one hundred sixty-two million, one hundred forty thousand, seven hundred twenty".