198257856 has 56 divisors (see below), whose sum is σ = 552175680. Its totient is φ = 62606592.

The previous prime is 198257831. The next prime is 198257887. The reversal of 198257856 is 658752891.

It is a junction number, because it is equal to n+sod(n) for n = 198257799 and 198257808.

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, 23526 + ... + 30821.

It is an arithmetic number, because the mean of its divisors is an integer number (9860280).

Almost surely, 2^198257856 is an apocalyptic number.

198257856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

198257856 is an abundant number, since it is smaller than the sum of its proper divisors (353917824).

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

198257856 is a wasteful number, since it uses less digits than its factorization.

198257856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54381 (or 54371 counting only the distinct ones).

The product of its digits is 1209600, while the sum is 51.

The square root of 198257856 is about 14080.4068123048. The cubic root of 198257856 is about 583.1005733321.

The spelling of 198257856 in words is "one hundred ninety-eight million, two hundred fifty-seven thousand, eight hundred fifty-six".