161849280 has 112 divisors (see below), whose sum is σ = 523731744. Its totient is φ = 42332160.

The previous prime is 161849279. The next prime is 161849293. The reversal of 161849280 is 82948161.

161849280 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49290 + ... + 52470.

Almost surely, 2^161849280 is an apocalyptic number.

161849280 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 161849280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (261865872).

161849280 is an abundant number, since it is smaller than the sum of its proper divisors (361882464).

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

161849280 is a wasteful number, since it uses less digits than its factorization.

161849280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3254 (or 3244 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 39.

The square root of 161849280 is about 12721.9998427920. Note that the first 3 decimals coincide. The cubic root of 161849280 is about 544.9670658773.

The spelling of 161849280 in words is "one hundred sixty-one million, eight hundred forty-nine thousand, two hundred eighty".