400040024002 has 16 divisors (see below), whose sum is σ = 602705650680. Its totient is φ = 199139496192.

The previous prime is 400040023897. The next prime is 400040024003. The reversal of 400040024002 is 200420040004.

It can be written as a sum of positive squares in 4 ways, for example, as 390613750081 + 9426273921 = 624991^2 + 97089^2 .

It is not an unprimeable number, because it can be changed into a prime (400040024003) 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, 252988 + ... + 929560.

Almost surely, 2^400040024002 is an apocalyptic number.

400040024002 is a deficient number, since it is larger than the sum of its proper divisors (202665626678).

400040024002 is a wasteful number, since it uses less digits than its factorization.

400040024002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 677877.

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

Adding to 400040024002 its reverse (200420040004), we get a palindrome (600460064006).

The spelling of 400040024002 in words is "four hundred billion, forty million, twenty-four thousand, two".