162120720 has 80 divisors (see below), whose sum is σ = 504199872. Its totient is φ = 43092480.

The previous prime is 162120703. The next prime is 162120727. The reversal of 162120720 is 27021261.

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

It is not an unprimeable number, because it can be changed into a prime (162120727) 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, 88615 + ... + 90425.

Almost surely, 2^162120720 is an apocalyptic number.

162120720 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 162120720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (252099936).

162120720 is an abundant number, since it is smaller than the sum of its proper divisors (342079152).

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

162120720 is a wasteful number, since it uses less digits than its factorization.

162120720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2200 (or 2194 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 162120720 is about 12732.6635076876. The cubic root of 162120720 is about 545.2715533631.

Adding to 162120720 its reverse (27021261), we get a palindrome (189141981).

The spelling of 162120720 in words is "one hundred sixty-two million, one hundred twenty thousand, seven hundred twenty".