163234640 has 20 divisors (see below), whose sum is σ = 379520724. Its totient is φ = 65293824.

The previous prime is 163234637. The next prime is 163234667. The reversal of 163234640 is 46432361.

It can be written as a sum of positive squares in 2 ways, for example, as 57638464 + 105596176 = 7592^2 + 10276^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1020137 + ... + 1020296.

Almost surely, 2^163234640 is an apocalyptic number.

163234640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

163234640 is an abundant number, since it is smaller than the sum of its proper divisors (216286084).

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

163234640 is a wasteful number, since it uses less digits than its factorization.

163234640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2040446 (or 2040440 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 163234640 is about 12776.3312417924. The cubic root of 163234640 is about 546.5175447576.

The spelling of 163234640 in words is "one hundred sixty-three million, two hundred thirty-four thousand, six hundred forty".