40012272 has 80 divisors (see below), whose sum is σ = 119873280. Its totient is φ = 12754368.

The previous prime is 40012267. The next prime is 40012277. The reversal of 40012272 is 27221004.

It is an interprime number because it is at equal distance from previous prime (40012267) and next prime (40012277).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40012277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7923 + ... + 11949.

It is an arithmetic number, because the mean of its divisors is an integer number (1498416).

Almost surely, 2^40012272 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 40012272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59936640).

40012272 is an abundant number, since it is smaller than the sum of its proper divisors (79861008).

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

40012272 is a wasteful number, since it uses less digits than its factorization.

40012272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4067 (or 4055 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 40012272 is about 6325.5254327210. The cubic root of 40012272 is about 342.0301604672.

Adding to 40012272 its reverse (27221004), we get a palindrome (67233276).

The spelling of 40012272 in words is "forty million, twelve thousand, two hundred seventy-two".