400040003982 has 32 divisors (see below), whose sum is σ = 807676531200. Its totient is φ = 132080948928.

The previous prime is 400040003981. The next prime is 400040003983. The reversal of 400040003982 is 289300040004.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (400040003981) and next prime (400040003983).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400040003981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4688619 + ... + 4773177.

It is an arithmetic number, because the mean of its divisors is an integer number (25239891600).

Almost surely, 2^400040003982 is an apocalyptic number.

400040003982 is an abundant number, since it is smaller than the sum of its proper divisors (407636527218).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400040003982 is a wasteful number, since it uses less digits than its factorization.

400040003982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92040.

The product of its (nonzero) digits is 6912, while the sum is 30.

Adding to 400040003982 its reverse (289300040004), we get a palindrome (689340043986).

The spelling of 400040003982 in words is "four hundred billion, forty million, three thousand, nine hundred eighty-two".