40115312 has 40 divisors (see below), whose sum is σ = 82363776. Its totient is φ = 18887616.

The previous prime is 40115303. The next prime is 40115347. The reversal of 40115312 is 21351104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23843 + ... + 25469.

Almost surely, 2^40115312 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 40115312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41181888).

40115312 is an abundant number, since it is smaller than the sum of its proper divisors (42248464).

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

40115312 is a wasteful number, since it uses less digits than its factorization.

40115312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1725 (or 1719 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 40115312 is about 6333.6649737731. The cubic root of 40115312 is about 342.3235086215.

Adding to 40115312 its reverse (21351104), we get a palindrome (61466416).

The spelling of 40115312 in words is "forty million, one hundred fifteen thousand, three hundred twelve".