163331028 has 72 divisors (see below), whose sum is σ = 482850368. Its totient is φ = 45577728.

The previous prime is 163331009. The next prime is 163331081. The reversal of 163331028 is 820133361.

It is a happy number.

163331028 is a `hidden beast` number, since 1 + 633 + 3 + 1 + 0 + 28 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 163330992 and 163331010.

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, 3300 + ... + 18372.

Almost surely, 2^163331028 is an apocalyptic number.

163331028 is a gapful number since it is divisible by the number (18) 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 163331028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (241425184).

163331028 is an abundant number, since it is smaller than the sum of its proper divisors (319519340).

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

163331028 is a wasteful number, since it uses less digits than its factorization.

163331028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15133 (or 15128 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 163331028 is about 12780.1028164878. The cubic root of 163331028 is about 546.6250941682.

Adding to 163331028 its reverse (820133361), we get a palindrome (983464389).

The spelling of 163331028 in words is "one hundred sixty-three million, three hundred thirty-one thousand, twenty-eight".