163924840 has 16 divisors (see below), whose sum is σ = 368830980. Its totient is φ = 65569920.

The previous prime is 163924823. The next prime is 163924867. The reversal of 163924840 is 48429361.

It can be written as a sum of positive squares in 2 ways, for example, as 159820164 + 4104676 = 12642^2 + 2026^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 163924840.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2049021 + ... + 2049100.

Almost surely, 2^163924840 is an apocalyptic number.

163924840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

163924840 is an abundant number, since it is smaller than the sum of its proper divisors (204906140).

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

163924840 is a wasteful number, since it uses less digits than its factorization.

163924840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4098132 (or 4098128 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 163924840 is about 12803.3136335872. The cubic root of 163924840 is about 547.2867360912.

The spelling of 163924840 in words is "one hundred sixty-three million, nine hundred twenty-four thousand, eight hundred forty".