163403964 has 18 divisors (see below), whose sum is σ = 413049000. Its totient is φ = 54467976.

The previous prime is 163403963. The next prime is 163404001. The reversal of 163403964 is 469304361.

163403964 is a `hidden beast` number, since 163 + 403 + 96 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 4538999 = 163403964 / (1 + 6 + 3 + 4 + 0 + 3 + 9 + 6 + 4).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163403963) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2269464 + ... + 2269535.

Almost surely, 2^163403964 is an apocalyptic number.

It is an amenable number.

163403964 is an abundant number, since it is smaller than the sum of its proper divisors (249645036).

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

163403964 is a wasteful number, since it uses less digits than its factorization.

163403964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4539009 (or 4539004 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 36.

The square root of 163403964 is about 12782.9559961693. The cubic root of 163403964 is about 546.7064477958.

The spelling of 163403964 in words is "one hundred sixty-three million, four hundred three thousand, nine hundred sixty-four".