163349820 has 72 divisors (see below), whose sum is σ = 508906944. Its totient is φ = 42380928.

The previous prime is 163349803. The next prime is 163349833. The reversal of 163349820 is 28943361.

163349820 is a `hidden beast` number, since 163 + 3 + 498 + 2 + 0 = 666.

163349820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5604 + ... + 18923.

It is an arithmetic number, because the mean of its divisors is an integer number (7068152).

Almost surely, 2^163349820 is an apocalyptic number.

163349820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

163349820 is an abundant number, since it is smaller than the sum of its proper divisors (345557124).

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

163349820 is a wasteful number, since it uses less digits than its factorization.

163349820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24579 (or 24574 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 163349820 is about 12780.8380006946. The cubic root of 163349820 is about 546.6460572903.

The spelling of 163349820 in words is "one hundred sixty-three million, three hundred forty-nine thousand, eight hundred twenty".