402680400040 has 64 divisors (see below), whose sum is σ = 948938716800. Its totient is φ = 153496180992.

The previous prime is 402680400029. The next prime is 402680400043. The reversal of 402680400040 is 40004086204.

It is a junction number, because it is equal to n+sod(n) for n = 402680399981 and 402680400008.

It is not an unprimeable number, because it can be changed into a prime (402680400043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 566082 + ... + 1061041.

It is an arithmetic number, because the mean of its divisors is an integer number (14827167450).

Almost surely, 2^402680400040 is an apocalyptic number.

402680400040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

402680400040 is an abundant number, since it is smaller than the sum of its proper divisors (546258316760).

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

402680400040 is a wasteful number, since it uses less digits than its factorization.

402680400040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1627426 (or 1627422 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 402680400040 its reverse (40004086204), we get a palindrome (442684486244).

The spelling of 402680400040 in words is "four hundred two billion, six hundred eighty million, four hundred thousand, forty".