163404420 has 48 divisors (see below), whose sum is σ = 477429120. Its totient is φ = 41679616.

The previous prime is 163404419. The next prime is 163404431. The reversal of 163404420 is 24404361.

163404420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57825 + ... + 60584.

It is an arithmetic number, because the mean of its divisors is an integer number (9946440).

Almost surely, 2^163404420 is an apocalyptic number.

163404420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

163404420 is an abundant number, since it is smaller than the sum of its proper divisors (314024700).

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

163404420 is a wasteful number, since it uses less digits than its factorization.

163404420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118444 (or 118442 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 163404420 is about 12782.9738324069. The cubic root of 163404420 is about 546.7069563471.

Adding to 163404420 its reverse (24404361), we get a palindrome (187808781).

The spelling of 163404420 in words is "one hundred sixty-three million, four hundred four thousand, four hundred twenty".