402449 has 8 divisors (see below), whose sum is σ = 421800. Its totient is φ = 383616.

The previous prime is 402443. The next prime is 402487. The reversal of 402449 is 944204.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 71824 + 330625 = 268^2 + 575^2 .

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

It is not a de Polignac number, because 402449 - 2¹² = 398353 is a prime.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (402443) 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, 2627 + ... + 2775.

It is an arithmetic number, because the mean of its divisors is an integer number (52725).

2⁴⁰²⁴⁴⁹ is an apocalyptic number.

It is an amenable number.

402449 is a deficient number, since it is larger than the sum of its proper divisors (19351).

402449 is a wasteful number, since it uses less digits than its factorization.

402449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 402449 is about 634.3886821185. The cubic root of 402449 is about 73.8306940182.

The spelling of 402449 in words is "four hundred two thousand, four hundred forty-nine".