285128703 has 12 divisors (see below), whose sum is σ = 412021480. Its totient is φ = 190007856.

The previous prime is 285128699. The next prime is 285128713. The reversal of 285128703 is 307821582.

It is not a de Polignac number, because 285128703 - 2² = 285128699 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285128713) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24408 + ... + 34146.

Almost surely, 2^285128703 is an apocalyptic number.

285128703 is a deficient number, since it is larger than the sum of its proper divisors (126892777).

285128703 is a wasteful number, since it uses less digits than its factorization.

285128703 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12998 (or 12995 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 285128703 is about 16885.7544397637. The cubic root of 285128703 is about 658.1834829510.

The spelling of 285128703 in words is "two hundred eighty-five million, one hundred twenty-eight thousand, seven hundred three".