40071312 has 60 divisors (see below), whose sum is σ = 118747980. Its totient is φ = 12570624.

The previous prime is 40071299. The next prime is 40071319. The reversal of 40071312 is 21317004.

It can be written as a sum of positive squares in 2 ways, for example, as 22127616 + 17943696 = 4704^2 + 4236^2 .

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

It is not an unprimeable number, because it can be changed into a prime (40071319) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5737 + ... + 10632.

It is an arithmetic number, because the mean of its divisors is an integer number (1979133).

Almost surely, 2^40071312 is an apocalyptic number.

It is an amenable number.

40071312 is an abundant number, since it is smaller than the sum of its proper divisors (78676668).

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

40071312 is a wasteful number, since it uses less digits than its factorization.

40071312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16400 (or 16391 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 40071312 is about 6330.1905184599. The cubic root of 40071312 is about 342.1983050194.

Adding to 40071312 its reverse (21317004), we get a palindrome (61388316).

The spelling of 40071312 in words is "forty million, seventy-one thousand, three hundred twelve".