163402730 has 32 divisors (see below), whose sum is σ = 303080400. Its totient is φ = 63383040.

The previous prime is 163402727. The next prime is 163402747. The reversal of 163402730 is 37204361.

It can be written as a sum of positive squares in 8 ways, for example, as 87590881 + 75811849 = 9359^2 + 8707^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 163402730.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 155246 + ... + 156294.

Almost surely, 2^163402730 is an apocalyptic number.

163402730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

163402730 is a deficient number, since it is larger than the sum of its proper divisors (139677670).

163402730 is a wasteful number, since it uses less digits than its factorization.

163402730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1514.

The product of its (nonzero) digits is 3024, while the sum is 26.

The square root of 163402730 is about 12782.9077286821. The cubic root of 163402730 is about 546.7050715798.

The spelling of 163402730 in words is "one hundred sixty-three million, four hundred two thousand, seven hundred thirty".