280461340 has 48 divisors (see below), whose sum is σ = 610815744. Its totient is φ = 108057600.

The previous prime is 280461281. The next prime is 280461341. The reversal of 280461340 is 43164082.

It is a junction number, because it is equal to n+sod(n) for n = 280461299 and 280461308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280461341) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 148482 + ... + 150358.

It is an arithmetic number, because the mean of its divisors is an integer number (12725328).

Almost surely, 2^280461340 is an apocalyptic number.

280461340 is a gapful number since it is divisible by the number (20) 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 280461340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (305407872).

280461340 is an abundant number, since it is smaller than the sum of its proper divisors (330354404).

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

280461340 is a wasteful number, since it uses less digits than its factorization.

280461340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2158 (or 2156 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 280461340 is about 16746.9800262615. The cubic root of 280461340 is about 654.5723681531.

The spelling of 280461340 in words is "two hundred eighty million, four hundred sixty-one thousand, three hundred forty".