163870398 has 32 divisors (see below), whose sum is σ = 364684320. Its totient is φ = 54544320.

The previous prime is 163870397. The next prime is 163870451. The reversal of 163870398 is 893078361.

It is a happy number.

163870398 is a `hidden beast` number, since 1 + 638 + 7 + 0 + 3 + 9 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163870391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44508 + ... + 48048.

It is an arithmetic number, because the mean of its divisors is an integer number (11396385).

Almost surely, 2^163870398 is an apocalyptic number.

163870398 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

163870398 is an abundant number, since it is smaller than the sum of its proper divisors (200813922).

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

163870398 is a wasteful number, since it uses less digits than its factorization.

163870398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4409 (or 4403 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 163870398 is about 12801.1873668031. The cubic root of 163870398 is about 547.2261418913.

The spelling of 163870398 in words is "one hundred sixty-three million, eight hundred seventy thousand, three hundred ninety-eight".