281428263 has 14 divisors (see below), whose sum is σ = 421950464. Its totient is φ = 187618356.

The previous prime is 281428241. The next prime is 281428291. The reversal of 281428263 is 362824182.

It is not a de Polignac number, because 281428263 - 2¹³ = 281420071 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 (281426263) 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 13 ways as a sum of consecutive naturals, for example, 192295 + ... + 193752.

Almost surely, 2^281428263 is an apocalyptic number.

281428263 is a deficient number, since it is larger than the sum of its proper divisors (140522201).

281428263 is an frugal number, since it uses more digits than its factorization.

281428263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386065 (or 386050 counting only the distinct ones).

The product of its digits is 36864, while the sum is 36.

The square root of 281428263 is about 16775.8237651687. The cubic root of 281428263 is about 655.3237433831.

The spelling of 281428263 in words is "two hundred eighty-one million, four hundred twenty-eight thousand, two hundred sixty-three".