280023530 has 8 divisors (see below), whose sum is σ = 504042372. Its totient is φ = 112009408.

The previous prime is 280023517. The next prime is 280023533. The reversal of 280023530 is 35320082.

280023530 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 275659609 + 4363921 = 16603^2 + 2089^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 280023496 and 280023505.

It is not an unprimeable number, because it can be changed into a prime (280023533) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 14001167 + ... + 14001186.

Almost surely, 2^280023530 is an apocalyptic number.

280023530 is a deficient number, since it is larger than the sum of its proper divisors (224018842).

280023530 is a wasteful number, since it uses less digits than its factorization.

280023530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28002360.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 280023530 is about 16733.9036091403. The cubic root of 280023530 is about 654.2315872840.

The spelling of 280023530 in words is "two hundred eighty million, twenty-three thousand, five hundred thirty".