161244928 has 54 divisors (see below), whose sum is σ = 348616464. Its totient is φ = 74400768.

The previous prime is 161244917. The next prime is 161244931. The reversal of 161244928 is 829442161.

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 5 ways as a sum of consecutive naturals, for example, 41401 + ... + 45127.

Almost surely, 2^161244928 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 161244928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174308232).

161244928 is an abundant number, since it is smaller than the sum of its proper divisors (187371536).

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

161244928 is an equidigital number, since it uses as much as digits as its factorization.

161244928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3769 (or 3742 counting only the distinct ones).

The product of its digits is 27648, while the sum is 37.

The square root of 161244928 is about 12698.2253878249. The cubic root of 161244928 is about 544.2879098817.

The spelling of 161244928 in words is "one hundred sixty-one million, two hundred forty-four thousand, nine hundred twenty-eight".