163816240 has 80 divisors (see below), whose sum is σ = 445471488. Its totient is φ = 54851328.

The previous prime is 163816231. The next prime is 163816249. The reversal of 163816240 is 42618361.

It is a happy number.

163816240 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (163816231) and next prime (163816249).

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (163816249) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20679 + ... + 27481.

Almost surely, 2^163816240 is an apocalyptic number.

163816240 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 163816240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (222735744).

163816240 is an abundant number, since it is smaller than the sum of its proper divisors (281655248).

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

163816240 is a wasteful number, since it uses less digits than its factorization.

163816240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6866 (or 6860 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 163816240 is about 12799.0718413485. The cubic root of 163816240 is about 547.1658504674.

The spelling of 163816240 in words is "one hundred sixty-three million, eight hundred sixteen thousand, two hundred forty".