163857330 has 336 divisors, whose sum is σ = 576054720. Its totient is φ = 32752512.

The previous prime is 163857319. The next prime is 163857341. The reversal of 163857330 is 33758361.

It is an interprime number because it is at equal distance from previous prime (163857319) and next prime (163857341).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 167 ways as a sum of consecutive naturals, for example, 8624061 + ... + 8624079.

Almost surely, 2^163857330 is an apocalyptic number.

163857330 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 163857330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (288027360).

163857330 is an abundant number, since it is smaller than the sum of its proper divisors (412197390).

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

163857330 is a wasteful number, since it uses less digits than its factorization.

163857330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77 (or 49 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 163857330 is about 12800.6769352249. The cubic root of 163857330 is about 547.2115951490.

The spelling of 163857330 in words is "one hundred sixty-three million, eight hundred fifty-seven thousand, three hundred thirty".