161248280 has 64 divisors (see below), whose sum is σ = 373744800. Its totient is φ = 62576640.

The previous prime is 161248279. The next prime is 161248301. The reversal of 161248280 is 82842161.

It is a happy number.

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, 414326 + ... + 414714.

Almost surely, 2^161248280 is an apocalyptic number.

161248280 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 161248280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (186872400).

161248280 is an abundant number, since it is smaller than the sum of its proper divisors (212496520).

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

161248280 is a wasteful number, since it uses less digits than its factorization.

161248280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684 (or 680 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 161248280 is about 12698.3573740858. The cubic root of 161248280 is about 544.2916814534.

The spelling of 161248280 in words is "one hundred sixty-one million, two hundred forty-eight thousand, two hundred eighty".