162400720 has 20 divisors (see below), whose sum is σ = 377581860. Its totient is φ = 64960256.

The previous prime is 162400709. The next prime is 162400741. The reversal of 162400720 is 27004261.

It can be written as a sum of positive squares in 2 ways, for example, as 101123136 + 61277584 = 10056^2 + 7828^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 162400691 and 162400700.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1014925 + ... + 1015084.

It is an arithmetic number, because the mean of its divisors is an integer number (18879093).

Almost surely, 2^162400720 is an apocalyptic number.

162400720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

162400720 is an abundant number, since it is smaller than the sum of its proper divisors (215181140).

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

162400720 is a wasteful number, since it uses less digits than its factorization.

162400720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2030022 (or 2030016 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 162400720 is about 12743.6541070448. The cubic root of 162400720 is about 545.5852871108.

Adding to 162400720 its reverse (27004261), we get a palindrome (189404981).

The spelling of 162400720 in words is "one hundred sixty-two million, four hundred thousand, seven hundred twenty".