40168252 has 12 divisors (see below), whose sum is σ = 70590240. Its totient is φ = 19999616.

The previous prime is 40168243. The next prime is 40168259. The reversal of 40168252 is 25286104.

It is a super-2 number, since 2×40168252² = 3226976937471008, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40168252.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40168259) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20053 + ... + 21964.

It is an arithmetic number, because the mean of its divisors is an integer number (5882520).

Almost surely, 2^40168252 is an apocalyptic number.

It is an amenable number.

40168252 is a deficient number, since it is larger than the sum of its proper divisors (30421988).

40168252 is a wasteful number, since it uses less digits than its factorization.

40168252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42260 (or 42258 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 40168252 is about 6337.8428506867. The cubic root of 40168252 is about 342.4740300340.

The spelling of 40168252 in words is "forty million, one hundred sixty-eight thousand, two hundred fifty-two".