40921235388 has 108 divisors (see below), whose sum is σ = 115300536624. Its totient is φ = 12225628800.

The previous prime is 40921235387. The next prime is 40921235417. The reversal of 40921235388 is 88353212904.

40921235388 is a `hidden beast` number, since 4 + 0 + 9 + 212 + 353 + 88 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40921235387) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 243120 + ... + 375432.

Almost surely, 2^40921235388 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 40921235388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57650268312).

40921235388 is an abundant number, since it is smaller than the sum of its proper divisors (74379301236).

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

40921235388 is a wasteful number, since it uses less digits than its factorization.

40921235388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132416 (or 132400 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

It can be divided in two parts, 409212353 and 88, that added together give a square (409212441 = 20229²).

The spelling of 40921235388 in words is "forty billion, nine hundred twenty-one million, two hundred thirty-five thousand, three hundred eighty-eight".