163704420 has 144 divisors (see below), whose sum is σ = 560589120. Its totient is φ = 38304000.

The previous prime is 163704377. The next prime is 163704421. The reversal of 163704420 is 24407361.

163704420 is a `hidden beast` number, since 1 + 637 + 0 + 4 + 4 + 20 = 666.

163704420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163704421) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 55995 + ... + 58845.

It is an arithmetic number, because the mean of its divisors is an integer number (3892980).

Almost surely, 2^163704420 is an apocalyptic number.

163704420 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 163704420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (280294560).

163704420 is an abundant number, since it is smaller than the sum of its proper divisors (396884700).

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

163704420 is a wasteful number, since it uses less digits than its factorization.

163704420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2906 (or 2901 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 163704420 is about 12794.7028101476. The cubic root of 163704420 is about 547.0413247346.

The spelling of 163704420 in words is "one hundred sixty-three million, seven hundred four thousand, four hundred twenty".