402040004 has 12 divisors (see below), whose sum is σ = 744956604. Its totient is φ = 189195264.

The previous prime is 402039997. The next prime is 402040007. The reversal of 402040004 is 400040204.

It can be written as a sum of positive squares in 2 ways, for example, as 288660100 + 113379904 = 16990^2 + 10648^2 .

It is not an unprimeable number, because it can be changed into a prime (402040007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2956109 + ... + 2956244.

It is an arithmetic number, because the mean of its divisors is an integer number (62079717).

Almost surely, 2^402040004 is an apocalyptic number.

It is an amenable number.

402040004 is a deficient number, since it is larger than the sum of its proper divisors (342916600).

402040004 is a wasteful number, since it uses less digits than its factorization.

402040004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5912374 (or 5912372 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 402040004 is about 20050.9352400331. The cubic root of 402040004 is about 738.0567495279.

Adding to 402040004 its reverse (400040204), we get a palindrome (802080208).

The spelling of 402040004 in words is "four hundred two million, forty thousand, four".