163004400 has 420 divisors, whose sum is σ = 647029768. Its totient is φ = 39191040.

The previous prime is 163004399. The next prime is 163004407. The reversal of 163004400 is 4400361.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163004407) by changing a digit.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 3790779 + ... + 3790821.

Almost surely, 2^163004400 is an apocalyptic number.

163004400 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 163004400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (323514884).

163004400 is an abundant number, since it is smaller than the sum of its proper divisors (484025368).

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

163004400 is a wasteful number, since it uses less digits than its factorization.

163004400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92 (or 66 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 163004400 is about 12767.3176509398. The cubic root of 163004400 is about 546.2604722668.

Adding to 163004400 its reverse (4400361), we get a palindrome (167404761).

The spelling of 163004400 in words is "one hundred sixty-three million, four thousand, four hundred".