161826240 has 112 divisors (see below), whose sum is σ = 519196320. Its totient is φ = 42700800.

The previous prime is 161826233. The next prime is 161826251. The reversal of 161826240 is 42628161.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 161826198 and 161826207.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96126 + ... + 97794.

Almost surely, 2^161826240 is an apocalyptic number.

161826240 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 161826240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (259598160).

161826240 is an abundant number, since it is smaller than the sum of its proper divisors (357370080).

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

161826240 is a wasteful number, since it uses less digits than its factorization.

161826240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1790 (or 1780 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 161826240 is about 12721.0942925520. The cubic root of 161826240 is about 544.9412051155.

It can be divided in two parts, 16182 and 6240, that added together give a palindrome (22422).

The spelling of 161826240 in words is "one hundred sixty-one million, eight hundred twenty-six thousand, two hundred forty".