197921856 has 112 divisors (see below), whose sum is σ = 589897728. Its totient is φ = 58022400.

The previous prime is 197921827. The next prime is 197921929. The reversal of 197921856 is 658129791.

It is a super-2 number, since 2×197921856² = 78346122164969472, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 63961 + ... + 66983.

It is an arithmetic number, because the mean of its divisors is an integer number (5266944).

Almost surely, 2^197921856 is an apocalyptic number.

197921856 is a gapful number since it is divisible by the number (16) 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 197921856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (294948864).

197921856 is an abundant number, since it is smaller than the sum of its proper divisors (391975872).

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

197921856 is a wasteful number, since it uses less digits than its factorization.

197921856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3080 (or 3070 counting only the distinct ones).

The product of its digits is 272160, while the sum is 48.

The square root of 197921856 is about 14068.4702793161. The cubic root of 197921856 is about 582.7709813869.

The spelling of 197921856 in words is "one hundred ninety-seven million, nine hundred twenty-one thousand, eight hundred fifty-six".