402448 has 10 divisors (see below), whose sum is σ = 779774. Its totient is φ = 201216.

The previous prime is 402443. The next prime is 402487. The reversal of 402448 is 844204.

It can be written as a sum of positive squares in only one way, i.e., 350464 + 51984 = 592^2 + 228^2 .

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.

402448 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12561 + ... + 12592.

2⁴⁰²⁴⁴⁸ is an apocalyptic number.

It is an amenable number.

402448 is a deficient number, since it is larger than the sum of its proper divisors (377326).

402448 is a wasteful number, since it uses less digits than its factorization.

402448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25161 (or 25155 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

The square root of 402448 is about 634.3878939576. The cubic root of 402448 is about 73.8306328669.

The spelling of 402448 in words is "four hundred two thousand, four hundred forty-eight".