163406220 has 24 divisors (see below), whose sum is σ = 457537584. Its totient is φ = 43574976.

The previous prime is 163406219. The next prime is 163406231. The reversal of 163406220 is 22604361.

163406220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1361659 + ... + 1361778.

It is an arithmetic number, because the mean of its divisors is an integer number (19064066).

Almost surely, 2^163406220 is an apocalyptic number.

163406220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

163406220 is an abundant number, since it is smaller than the sum of its proper divisors (294131364).

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

163406220 is a wasteful number, since it uses less digits than its factorization.

163406220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2723449 (or 2723447 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 163406220 is about 12783.0442383651. The cubic root of 163406220 is about 546.7089637773.

The spelling of 163406220 in words is "one hundred sixty-three million, four hundred six thousand, two hundred twenty".