280128315 has 16 divisors (see below), whose sum is σ = 450086400. Its totient is φ = 148774752.

The previous prime is 280128311. The next prime is 280128323. The reversal of 280128315 is 513821082.

It is not a de Polignac number, because 280128315 - 2² = 280128311 is a prime.

It is not an unprimeable number, because it can be changed into a prime (280128311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35485 + ... + 42654.

It is an arithmetic number, because the mean of its divisors is an integer number (28130400).

Almost surely, 2^280128315 is an apocalyptic number.

280128315 is a deficient number, since it is larger than the sum of its proper divisors (169958085).

280128315 is a wasteful number, since it uses less digits than its factorization.

280128315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78386.

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 280128315 is about 16737.0342354911. The cubic root of 280128315 is about 654.3131817458.

Adding to 280128315 its reverse (513821082), we get a palindrome (793949397).

The spelling of 280128315 in words is "two hundred eighty million, one hundred twenty-eight thousand, three hundred fifteen".