163960820 has 12 divisors (see below), whose sum is σ = 344317764. Its totient is φ = 65584320.

The previous prime is 163960817. The next prime is 163960837. The reversal of 163960820 is 28069361.

It can be written as a sum of positive squares in 2 ways, for example, as 17405584 + 146555236 = 4172^2 + 12106^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4099001 + ... + 4099040.

It is an arithmetic number, because the mean of its divisors is an integer number (28693147).

Almost surely, 2^163960820 is an apocalyptic number.

163960820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

163960820 is an abundant number, since it is smaller than the sum of its proper divisors (180356944).

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

163960820 is a wasteful number, since it uses less digits than its factorization.

163960820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8198050 (or 8198048 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 163960820 is about 12804.7186614935. The cubic root of 163960820 is about 547.3267746362.

The spelling of 163960820 in words is "one hundred sixty-three million, nine hundred sixty thousand, eight hundred twenty".