402730281 has 12 divisors (see below), whose sum is σ = 582063040. Its totient is φ = 268329240.

The previous prime is 402730261. The next prime is 402730301. The reversal of 402730281 is 182037204.

It is an interprime number because it is at equal distance from previous prime (402730261) and next prime (402730301).

It is not a de Polignac number, because 402730281 - 2¹¹ = 402728233 is a prime.

It is a super-2 number, since 2×402730281² = 324383358468677922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402730201) 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, 4260 + ... + 28698.

Almost surely, 2^402730281 is an apocalyptic number.

It is an amenable number.

402730281 is a deficient number, since it is larger than the sum of its proper divisors (179332759).

402730281 is a wasteful number, since it uses less digits than its factorization.

402730281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26276 (or 26273 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 402730281 is about 20068.1409452894. The cubic root of 402730281 is about 738.4789067755.

Adding to 402730281 its reverse (182037204), we get a palindrome (584767485).

The spelling of 402730281 in words is "four hundred two million, seven hundred thirty thousand, two hundred eighty-one".