161826444 has 96 divisors (see below), whose sum is σ = 457856000. Its totient is φ = 49128768.

The previous prime is 161826433. The next prime is 161826461. The reversal of 161826444 is 444628161.

It is a happy number.

161826444 is a `hidden beast` number, since 1 + 6 + 1 + 8 + 2 + 644 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 161826399 and 161826408.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 110187 + ... + 111645.

Almost surely, 2^161826444 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 161826444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (228928000).

161826444 is an abundant number, since it is smaller than the sum of its proper divisors (296029556).

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

161826444 is a wasteful number, since it uses less digits than its factorization.

161826444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1564 (or 1556 counting only the distinct ones).

The product of its digits is 36864, while the sum is 36.

The square root of 161826444 is about 12721.1023107276. The cubic root of 161826444 is about 544.9414341017.

The spelling of 161826444 in words is "one hundred sixty-one million, eight hundred twenty-six thousand, four hundred forty-four".