163073920 has 32 divisors (see below), whose sum is σ = 389850120. Its totient is φ = 65229312.

The previous prime is 163073891. The next prime is 163073921. The reversal of 163073920 is 29370361.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163073921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126762 + ... + 128041.

Almost surely, 2^163073920 is an apocalyptic number.

163073920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

163073920 is an abundant number, since it is smaller than the sum of its proper divisors (226776200).

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

163073920 is an equidigital number, since it uses as much as digits as its factorization.

163073920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254822 (or 254810 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 31.

The square root of 163073920 is about 12770.0399372907. The cubic root of 163073920 is about 546.3381197219.

The spelling of 163073920 in words is "one hundred sixty-three million, seventy-three thousand, nine hundred twenty".