400202452 has 12 divisors (see below), whose sum is σ = 754227796. Its totient is φ = 184708800.

The previous prime is 400202449. The next prime is 400202489. The reversal of 400202452 is 254202004.

It can be written as a sum of positive squares in 2 ways, for example, as 62157456 + 338044996 = 7884^2 + 18386^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3848049 + ... + 3848152.

Almost surely, 2^400202452 is an apocalyptic number.

It is an amenable number.

400202452 is a deficient number, since it is larger than the sum of its proper divisors (354025344).

400202452 is a wasteful number, since it uses less digits than its factorization.

400202452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7696218 (or 7696216 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 400202452 is about 20005.0606597431. The cubic root of 400202452 is about 736.9305853530.

Adding to 400202452 its reverse (254202004), we get a palindrome (654404456).

The spelling of 400202452 in words is "four hundred million, two hundred two thousand, four hundred fifty-two".