40338817988 has 48 divisors (see below), whose sum is σ = 83223611520. Its totient is φ = 16746621696.

The previous prime is 40338817963. The next prime is 40338818011. The reversal of 40338817988 is 88971883304.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 149408 + ... + 320936.

It is an arithmetic number, because the mean of its divisors is an integer number (1733825240).

Almost surely, 2^40338817988 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40338817988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41611805760).

40338817988 is an abundant number, since it is smaller than the sum of its proper divisors (42884793532).

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

40338817988 is a wasteful number, since it uses less digits than its factorization.

40338817988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171804 (or 171802 counting only the distinct ones).

The product of its (nonzero) digits is 9289728, while the sum is 59.

The spelling of 40338817988 in words is "forty billion, three hundred thirty-eight million, eight hundred seventeen thousand, nine hundred eighty-eight".