400402001324 has 24 divisors (see below), whose sum is σ = 754650722448. Its totient is φ = 184789425600.

The previous prime is 400402001323. The next prime is 400402001339. The reversal of 400402001324 is 423100204004.

It is a junction number, because it is equal to n+sod(n) for n = 400402001296 and 400402001305.

It is not an unprimeable number, because it can be changed into a prime (400402001323) 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, 634634 + ... + 1097070.

It is an arithmetic number, because the mean of its divisors is an integer number (31443780102).

Almost surely, 2^400402001324 is an apocalyptic number.

It is an amenable number.

400402001324 is a deficient number, since it is larger than the sum of its proper divisors (354248721124).

400402001324 is a wasteful number, since it uses less digits than its factorization.

400402001324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479105 (or 479103 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 400402001324 its reverse (423100204004), we get a palindrome (823502205328).

The spelling of 400402001324 in words is "four hundred billion, four hundred two million, one thousand, three hundred twenty-four".