163992620 has 48 divisors (see below), whose sum is σ = 384876576. Its totient is φ = 58176000.

The previous prime is 163992601. The next prime is 163992671. The reversal of 163992620 is 26299361.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71 + ... + 18110.

It is an arithmetic number, because the mean of its divisors is an integer number (8018262).

Almost surely, 2^163992620 is an apocalyptic number.

163992620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 163992620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (192438288).

163992620 is an abundant number, since it is smaller than the sum of its proper divisors (220883956).

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

163992620 is a wasteful number, since it uses less digits than its factorization.

163992620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18242 (or 18240 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 163992620 is about 12805.9603310334. The cubic root of 163992620 is about 547.3621568012.

The spelling of 163992620 in words is "one hundred sixty-three million, nine hundred ninety-two thousand, six hundred twenty".