400443210402 has 16 divisors (see below), whose sum is σ = 800901852672. Its totient is φ = 133478498160.

The previous prime is 400443210397. The next prime is 400443210421. The reversal of 400443210402 is 204012344004.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 290818 + ... + 940989.

It is an arithmetic number, because the mean of its divisors is an integer number (50056365792).

Almost surely, 2^400443210402 is an apocalyptic number.

400443210402 is an abundant number, since it is smaller than the sum of its proper divisors (400458642270).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400443210402 is a wasteful number, since it uses less digits than its factorization.

400443210402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1285993.

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 400443210402 its reverse (204012344004), we get a palindrome (604455554406).

The spelling of 400443210402 in words is "four hundred billion, four hundred forty-three million, two hundred ten thousand, four hundred two".