40439006208 has 132 divisors (see below), whose sum is σ = 118682611788. Its totient is φ = 13258506240.

The previous prime is 40439006191. The next prime is 40439006227. The reversal of 40439006208 is 80260093404.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 681836544 + 39757169664 = 26112^2 + 199392^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 526210 + ... + 598142.

Almost surely, 2^40439006208 is an apocalyptic number.

40439006208 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40439006208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59341305894).

40439006208 is an abundant number, since it is smaller than the sum of its proper divisors (78243605580).

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

40439006208 is a wasteful number, since it uses less digits than its factorization.

40439006208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72020 (or 71999 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The spelling of 40439006208 in words is "forty billion, four hundred thirty-nine million, six thousand, two hundred eight".