163724420 has 48 divisors (see below), whose sum is σ = 352256688. Its totient is φ = 63897600.

The previous prime is 163724413. The next prime is 163724437. The reversal of 163724420 is 24427361.

It can be written as a sum of positive squares in 8 ways, for example, as 46348864 + 117375556 = 6808^2 + 10834^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 272120 + ... + 272720.

It is an arithmetic number, because the mean of its divisors is an integer number (7338681).

Almost surely, 2^163724420 is an apocalyptic number.

163724420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

163724420 is an abundant number, since it is smaller than the sum of its proper divisors (188532268).

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

163724420 is a wasteful number, since it uses less digits than its factorization.

163724420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 920 (or 918 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 163724420 is about 12795.4843597263. The cubic root of 163724420 is about 547.0636014310.

The spelling of 163724420 in words is "one hundred sixty-three million, seven hundred twenty-four thousand, four hundred twenty".