402240269 has 2 divisors, whose sum is σ = 402240270. Its totient is φ = 402240268.

The previous prime is 402240257. The next prime is 402240341. The reversal of 402240269 is 962042204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 401802025 + 438244 = 20045^2 + 662^2 .

It is a cyclic number.

It is not a de Polignac number, because 402240269 - 2¹² = 402236173 is a prime.

It is a super-2 number, since 2×402240269² = 323594468010384722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402240239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201120134 + 201120135.

It is an arithmetic number, because the mean of its divisors is an integer number (201120135).

Almost surely, 2^402240269 is an apocalyptic number.

It is an amenable number.

402240269 is a deficient number, since it is larger than the sum of its proper divisors (1).

402240269 is an equidigital number, since it uses as much as digits as its factorization.

402240269 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 402240269 is about 20055.9285250023. The cubic root of 402240269 is about 738.1792766382.

The spelling of 402240269 in words is "four hundred two million, two hundred forty thousand, two hundred sixty-nine".