400402240004 has 24 divisors (see below), whose sum is σ = 755460839448. Its totient is φ = 184591249920.

The previous prime is 400402239983. The next prime is 400402240009. The reversal of 400402240004 is 400042204004.

It can be written as a sum of positive squares in 4 ways, for example, as 22755119104 + 377647120900 = 150848^2 + 614530^2 .

It is not an unprimeable number, because it can be changed into a prime (400402240009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4324247 + ... + 4415870.

It is an arithmetic number, because the mean of its divisors is an integer number (31477534977).

Almost surely, 2^400402240004 is an apocalyptic number.

It is an amenable number.

400402240004 is a deficient number, since it is larger than the sum of its proper divisors (355058599444).

400402240004 is a wasteful number, since it uses less digits than its factorization.

400402240004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8741015 (or 8741013 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

Adding to 400402240004 its reverse (400042204004), we get a palindrome (800444444008).

The spelling of 400402240004 in words is "four hundred billion, four hundred two million, two hundred forty thousand, four".