40020000732 has 144 divisors (see below), whose sum is σ = 107985346560. Its totient is φ = 12461226624.

The previous prime is 40020000721. The next prime is 40020000743. The reversal of 40020000732 is 23700002004.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (40020000721) and next prime (40020000743).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15026833 + ... + 15029495.

It is an arithmetic number, because the mean of its divisors is an integer number (749898240).

Almost surely, 2^40020000732 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 40020000732, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53992673280).

40020000732 is an abundant number, since it is smaller than the sum of its proper divisors (67965345828).

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

40020000732 is a wasteful number, since it uses less digits than its factorization.

40020000732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2992 (or 2987 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 18.

Adding to 40020000732 its reverse (23700002004), we get a palindrome (63720002736).

The spelling of 40020000732 in words is "forty billion, twenty million, seven hundred thirty-two", and thus it is an aban number.