3161280 has 112 divisors (see below), whose sum is σ = 10424160. Its totient is φ = 811008.

The previous prime is 3161273. The next prime is 3161293. The reversal of 3161280 is 821613.

It is a zygodrome in base 2.

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, 35476 + ... + 35564.

Almost surely, 2^3161280 is an apocalyptic number.

3161280 is a gapful number since it is divisible by the number (30) 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 3161280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5212080).

3161280 is an abundant number, since it is smaller than the sum of its proper divisors (7262880).

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

3161280 is a wasteful number, since it uses less digits than its factorization.

3161280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146 (or 136 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 3161280 is about 1777.9988751403. The cubic root of 3161280 is about 146.7644893777.

Adding to 3161280 its reverse (821613), we get a palindrome (3982893).

It can be divided in two parts, 316 and 1280, that added together give a triangular number (1596 = T₅₆).

The spelling of 3161280 in words is "three million, one hundred sixty-one thousand, two hundred eighty".