40236433632 has 144 divisors (see below), whose sum is σ = 118718151552. Its totient is φ = 12913044480.

The previous prime is 40236433619. The next prime is 40236433639. The reversal of 40236433632 is 23633463204.

40236433632 is a `hidden beast` number, since 4 + 0 + 2 + 3 + 643 + 3 + 6 + 3 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×40236433632² (a number of 22 digits) contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40236433639) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1747378 + ... + 1770254.

It is an arithmetic number, because the mean of its divisors is an integer number (824431608).

Almost surely, 2^40236433632 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 40236433632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59359075776).

40236433632 is an abundant number, since it is smaller than the sum of its proper divisors (78481717920).

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

40236433632 is a wasteful number, since it uses less digits than its factorization.

40236433632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23121 (or 23110 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 36.

Adding to 40236433632 its reverse (23633463204), we get a palindrome (63869896836).

The spelling of 40236433632 in words is "forty billion, two hundred thirty-six million, four hundred thirty-three thousand, six hundred thirty-two".