406009836138 has 64 divisors (see below), whose sum is σ = 837620974080. Its totient is φ = 131141058048.

The previous prime is 406009836137. The next prime is 406009836143. The reversal of 406009836138 is 831638900604.

It is a super-2 number, since 2×406009836138² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (406009836137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10830495 + ... + 10867917.

It is an arithmetic number, because the mean of its divisors is an integer number (13087827720).

Almost surely, 2^406009836138 is an apocalyptic number.

406009836138 is an abundant number, since it is smaller than the sum of its proper divisors (431611137942).

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

406009836138 is a wasteful number, since it uses less digits than its factorization.

406009836138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37903.

The product of its (nonzero) digits is 746496, while the sum is 48.

The spelling of 406009836138 in words is "four hundred six billion, nine million, eight hundred thirty-six thousand, one hundred thirty-eight".