400204402 has 8 divisors (see below), whose sum is σ = 646484076. Its totient is φ = 184709712.

The previous prime is 400204369. The next prime is 400204411. The reversal of 400204402 is 204402004.

It can be written as a sum of positive squares in 2 ways, for example, as 383728921 + 16475481 = 19589^2 + 4059^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7696213 + ... + 7696264.

Almost surely, 2^400204402 is an apocalyptic number.

400204402 is a deficient number, since it is larger than the sum of its proper divisors (246279674).

400204402 is a wasteful number, since it uses less digits than its factorization.

400204402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15392492.

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 400204402 is about 20005.1093973515. The cubic root of 400204402 is about 736.9317822575.

Adding to 400204402 its reverse (204402004), we get a palindrome (604606406).

The spelling of 400204402 in words is "four hundred million, two hundred four thousand, four hundred two".