163620870 has 64 divisors (see below), whose sum is σ = 449971200. Its totient is φ = 37300608.

The previous prime is 163620851. The next prime is 163620887. The reversal of 163620870 is 78026361.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 104856 + ... + 106404.

It is an arithmetic number, because the mean of its divisors is an integer number (7030800).

Almost surely, 2^163620870 is an apocalyptic number.

163620870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 163620870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (224985600).

163620870 is an abundant number, since it is smaller than the sum of its proper divisors (286350330).

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

163620870 is a wasteful number, since it uses less digits than its factorization.

163620870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2069.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 163620870 is about 12791.4373703662. The cubic root of 163620870 is about 546.9482442088.

The spelling of 163620870 in words is "one hundred sixty-three million, six hundred twenty thousand, eight hundred seventy".