161400408 has 64 divisors (see below), whose sum is σ = 437253600. Its totient is φ = 49645440.

The previous prime is 161400403. The next prime is 161400409. The reversal of 161400408 is 804004161.

161400408 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161400403) 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, 51198 + ... + 54258.

Almost surely, 2^161400408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161400408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (218626800).

161400408 is an abundant number, since it is smaller than the sum of its proper divisors (275853192).

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

161400408 is a wasteful number, since it uses less digits than its factorization.

161400408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3109 (or 3079 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 161400408 is about 12704.3460280331. The cubic root of 161400408 is about 544.4627964135.

Adding to 161400408 its reverse (804004161), we get a palindrome (965404569).

The spelling of 161400408 in words is "one hundred sixty-one million, four hundred thousand, four hundred eight".