345728280 has 64 divisors (see below), whose sum is σ = 1040830560. Its totient is φ = 91870208.

The previous prime is 345728263. The next prime is 345728291. The reversal of 345728280 is 82827543.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30244 + ... + 40076.

Almost surely, 2^345728280 is an apocalyptic number.

345728280 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 345728280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (520415280).

345728280 is an abundant number, since it is smaller than the sum of its proper divisors (695102280).

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

345728280 is a wasteful number, since it uses less digits than its factorization.

345728280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10140 (or 10136 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 39.

The square root of 345728280 is about 18593.7699243591. The cubic root of 345728280 is about 701.8510735127.

The spelling of 345728280 in words is "three hundred forty-five million, seven hundred twenty-eight thousand, two hundred eighty".