402440200040 has 32 divisors (see below), whose sum is σ = 953147844000. Its totient is φ = 152503654464.

The previous prime is 402440200027. The next prime is 402440200067. The reversal of 402440200040 is 40002044204.

It is a super-2 number, since 2×402440200040² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 402440199985 and 402440200021.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 264762530 + ... + 264764049.

It is an arithmetic number, because the mean of its divisors is an integer number (29785870125).

Almost surely, 2^402440200040 is an apocalyptic number.

402440200040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

402440200040 is an abundant number, since it is smaller than the sum of its proper divisors (550707643960).

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

402440200040 is a wasteful number, since it uses less digits than its factorization.

402440200040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529526609 (or 529526605 counting only the distinct ones).

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

Adding to 402440200040 its reverse (40002044204), we get a palindrome (442442244244).

The spelling of 402440200040 in words is "four hundred two billion, four hundred forty million, two hundred thousand, forty".