163450820 has 48 divisors (see below), whose sum is σ = 373518768. Its totient is φ = 59719680.

The previous prime is 163450799. The next prime is 163450831. The reversal of 163450820 is 28054361.

It can be written as a sum of positive squares in 8 ways, for example, as 20164 + 163430656 = 142^2 + 12784^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21980 + ... + 28460.

It is an arithmetic number, because the mean of its divisors is an integer number (7781641).

Almost surely, 2^163450820 is an apocalyptic number.

163450820 is a gapful number since it is divisible by the number (10) 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 163450820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (186759384).

163450820 is an abundant number, since it is smaller than the sum of its proper divisors (210067948).

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

163450820 is a wasteful number, since it uses less digits than its factorization.

163450820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6600 (or 6598 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 163450820 is about 12784.7886177285. The cubic root of 163450820 is about 546.7586987297.

The spelling of 163450820 in words is "one hundred sixty-three million, four hundred fifty thousand, eight hundred twenty".