163990624 has 24 divisors (see below), whose sum is σ = 368979408. Its totient is φ = 70281600.

The previous prime is 163990601. The next prime is 163990627. The reversal of 163990624 is 426099361.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163990627) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 365827 + ... + 366274.

It is an arithmetic number, because the mean of its divisors is an integer number (15374142).

Almost surely, 2^163990624 is an apocalyptic number.

163990624 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

163990624 is an abundant number, since it is smaller than the sum of its proper divisors (204988784).

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

163990624 is an equidigital number, since it uses as much as digits as its factorization.

163990624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732118 (or 732110 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 40.

The square root of 163990624 is about 12805.8823983355. The cubic root of 163990624 is about 547.3599360929.

The spelling of 163990624 in words is "one hundred sixty-three million, nine hundred ninety thousand, six hundred twenty-four".