163997400 has 96 divisors (see below), whose sum is σ = 581034240. Its totient is φ = 37484160.

The previous prime is 163997381. The next prime is 163997401. The reversal of 163997400 is 4799361.

163997400 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163997401) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15324 + ... + 23723.

It is an arithmetic number, because the mean of its divisors is an integer number (6052440).

Almost surely, 2^163997400 is an apocalyptic number.

163997400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

163997400 is an abundant number, since it is smaller than the sum of its proper divisors (417036840).

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

163997400 is a wasteful number, since it uses less digits than its factorization.

163997400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39073 (or 39064 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 39.

The square root of 163997400 is about 12806.1469615181. The cubic root of 163997400 is about 547.3674748569.

The spelling of 163997400 in words is "one hundred sixty-three million, nine hundred ninety-seven thousand, four hundred".