402000281 has 8 divisors (see below), whose sum is σ = 415680000. Its totient is φ = 388365120.

The previous prime is 402000251. The next prime is 402000293. The reversal of 402000281 is 182000204.

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

It is a cyclic number.

It is not a de Polignac number, because 402000281 - 2¹⁸ = 401738137 is a prime.

It is a super-2 number, since 2×402000281² = 323208451848157922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (402000251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7745 + ... + 29393.

It is an arithmetic number, because the mean of its divisors is an integer number (51960000).

Almost surely, 2^402000281 is an apocalyptic number.

It is an amenable number.

402000281 is a deficient number, since it is larger than the sum of its proper divisors (13679719).

402000281 is a wasteful number, since it uses less digits than its factorization.

402000281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22279.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 402000281 is about 20049.9446632653. The cubic root of 402000281 is about 738.0324411725.

Adding to 402000281 its reverse (182000204), we get a palindrome (584000485).

The spelling of 402000281 in words is "four hundred two million, two hundred eighty-one", and thus it is an aban number.