40012032 has 72 divisors (see below), whose sum is σ = 108609984. Its totient is φ = 13072384.

The previous prime is 40012003. The next prime is 40012051. The reversal of 40012032 is 23021004.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 40011999 and 40012017.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40213 + ... + 41195.

It is an arithmetic number, because the mean of its divisors is an integer number (1508472).

Almost surely, 2^40012032 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 40012032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54304992).

40012032 is an abundant number, since it is smaller than the sum of its proper divisors (68597952).

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

40012032 is an equidigital number, since it uses as much as digits as its factorization.

40012032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1055 (or 1041 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 40012032 is about 6325.5064619365. The cubic root of 40012032 is about 342.0294766153.

Adding to 40012032 its reverse (23021004), we get a palindrome (63033036).

The spelling of 40012032 in words is "forty million, twelve thousand, thirty-two".