400244240402 has 4 divisors (see below), whose sum is σ = 600366360606. Its totient is φ = 200122120200.

The previous prime is 400244240371. The next prime is 400244240419. The reversal of 400244240402 is 204042442004.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 255013890121 + 145230350281 = 504989^2 + 381091^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100061060099 + ... + 100061060102.

Almost surely, 2^400244240402 is an apocalyptic number.

400244240402 is a deficient number, since it is larger than the sum of its proper divisors (200122120204).

400244240402 is a wasteful number, since it uses less digits than its factorization.

400244240402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200122120203.

The product of its (nonzero) digits is 8192, while the sum is 26.

Adding to 400244240402 its reverse (204042442004), we get a palindrome (604286682406).

The spelling of 400244240402 in words is "four hundred billion, two hundred forty-four million, two hundred forty thousand, four hundred two".