161404200 has 72 divisors (see below), whose sum is σ = 542055150. Its totient is φ = 43040640.

The previous prime is 161404153. The next prime is 161404213. The reversal of 161404200 is 2404161.

161404200 is a `hidden beast` number, since 1 + 61 + 404 + 200 = 666.

161404200 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 102697956 + 58706244 = 10134^2 + 7662^2 .

It is a tau number, because it is divible by the number of its divisors (72).

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

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 43035 + ... + 46634.

Almost surely, 2^161404200 is an apocalyptic number.

161404200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161404200 is an abundant number, since it is smaller than the sum of its proper divisors (380650950).

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

161404200 is a wasteful number, since it uses less digits than its factorization.

161404200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89691 (or 89679 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 161404200 is about 12704.4952674240. The cubic root of 161404200 is about 544.4670603159.

Adding to 161404200 its reverse (2404161), we get a palindrome (163808361).

It can be divided in two parts, 161404 and 200, that added together give a square (161604 = 402²).

The spelling of 161404200 in words is "one hundred sixty-one million, four hundred four thousand, two hundred".