40347252 has 72 divisors (see below), whose sum is σ = 112213920. Its totient is φ = 12121920.

The previous prime is 40347217. The next prime is 40347259. The reversal of 40347252 is 25274304.

40347252 is a `hidden beast` number, since 403 + 4 + 7 + 252 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40347259) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 54678 + ... + 55410.

Almost surely, 2^40347252 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 40347252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56106960).

40347252 is an abundant number, since it is smaller than the sum of its proper divisors (71866668).

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

40347252 is a wasteful number, since it uses less digits than its factorization.

40347252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 893 (or 888 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 27.

The square root of 40347252 is about 6351.9486773745. The cubic root of 40347252 is about 342.9819935185.

The spelling of 40347252 in words is "forty million, three hundred forty-seven thousand, two hundred fifty-two".