280323842 has 6 divisors (see below), whose sum is σ = 420521283. Its totient is φ = 140150082.

The previous prime is 280323821. The next prime is 280323859. The reversal of 280323842 is 248323082.

It can be written as a sum of positive squares in only one way, i.e., 140161921 + 140161921 = 11839^2 + 11839^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=11839.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 280323799 and 280323808.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 17759 + ... + 29597.

Almost surely, 2^280323842 is an apocalyptic number.

280323842 is a deficient number, since it is larger than the sum of its proper divisors (140197441).

280323842 is an frugal number, since it uses more digits than its factorization.

280323842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23680 (or 11841 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 32.

The square root of 280323842 is about 16742.8743649351. The cubic root of 280323842 is about 654.4653812108.

Multiplying 280323842 by its sum of digits (32), we get a square (8970362944 = 94712²).

Multiplying 280323842 by its product of nonzero digits (18432), we get a square (5166929055744 = 2273088²).

The spelling of 280323842 in words is "two hundred eighty million, three hundred twenty-three thousand, eight hundred forty-two".