193816656 has 120 divisors (see below), whose sum is σ = 607904544. Its totient is φ = 57127680.

The previous prime is 193816639. The next prime is 193816661. The reversal of 193816656 is 656618391.

It is a super-2 number, since 2×193816656² = 75129792286044672, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56955 + ... + 60261.

Almost surely, 2^193816656 is an apocalyptic number.

193816656 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 193816656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (303952272).

193816656 is an abundant number, since it is smaller than the sum of its proper divisors (414087888).

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

193816656 is a wasteful number, since it uses less digits than its factorization.

193816656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3369 (or 3360 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 193816656 is about 13921.8050553799. The cubic root of 193816656 is about 578.7136135493.

The spelling of 193816656 in words is "one hundred ninety-three million, eight hundred sixteen thousand, six hundred fifty-six".