199078656 has 144 divisors (see below), whose sum is σ = 637728000. Its totient is φ = 53858304.

The previous prime is 199078643. The next prime is 199078667. The reversal of 199078656 is 656870991.

199078656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×199078656² = 79264622549532672, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 199078599 and 199078608.

It is a congruent number.

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, 101170 + ... + 103118.

Almost surely, 2^199078656 is an apocalyptic number.

199078656 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 199078656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (318864000).

199078656 is an abundant number, since it is smaller than the sum of its proper divisors (438649344).

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

199078656 is a wasteful number, since it uses less digits than its factorization.

199078656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1994 (or 1980 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 51.

The square root of 199078656 is about 14109.5235922408. The cubic root of 199078656 is about 583.9041564113.

The spelling of 199078656 in words is "one hundred ninety-nine million, seventy-eight thousand, six hundred fifty-six".