163307628 has 144 divisors (see below), whose sum is σ = 475517952. Its totient is φ = 46800000.

The previous prime is 163307591. The next prime is 163307647. The reversal of 163307628 is 826703361.

It is a happy number.

163307628 is a nontrivial binomial coefficient, being equal to C(18073, 2).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 163307592 and 163307601.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 650503 + ... + 650753.

It is an arithmetic number, because the mean of its divisors is an integer number (3302208).

Almost surely, 2^163307628 is an apocalyptic number.

163307628 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

163307628 is the 18072-nd triangular number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 163307628, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (237758976).

163307628 is an abundant number, since it is smaller than the sum of its proper divisors (312210324).

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

163307628 is a wasteful number, since it uses less digits than its factorization.

163307628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356 (or 351 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 163307628 is about 12779.1872981031. The cubic root of 163307628 is about 546.5989884159.

The spelling of 163307628 in words is "one hundred sixty-three million, three hundred seven thousand, six hundred twenty-eight".