402443249 has 18 divisors (see below), whose sum is σ = 448270578. Its totient is φ = 360921600.

The previous prime is 402443243. The next prime is 402443269. The reversal of 402443249 is 942344204.

It can be written as a sum of positive squares in 9 ways, for example, as 207561649 + 194881600 = 14407^2 + 13960^2 .

It is not a de Polignac number, because 402443249 - 2⁸ = 402442993 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402443243) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1669769 + ... + 1670009.

It is an arithmetic number, because the mean of its divisors is an integer number (24903921).

Almost surely, 2^402443249 is an apocalyptic number.

It is an amenable number.

402443249 is a deficient number, since it is larger than the sum of its proper divisors (45827329).

402443249 is an equidigital number, since it uses as much as digits as its factorization.

402443249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549 (or 295 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 32.

The square root of 402443249 is about 20060.9882358771. The cubic root of 402443249 is about 738.3034233607.

The spelling of 402443249 in words is "four hundred two million, four hundred forty-three thousand, two hundred forty-nine".