40218152 has 16 divisors (see below), whose sum is σ = 81209940. Its totient is φ = 18562176.

The previous prime is 40218151. The next prime is 40218181. The reversal of 40218152 is 25181204.

It can be written as a sum of positive squares in 2 ways, for example, as 40119556 + 98596 = 6334^2 + 314^2 .

It is not an unprimeable number, because it can be changed into a prime (40218151) 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, 193253 + ... + 193460.

Almost surely, 2^40218152 is an apocalyptic number.

It is an amenable number.

40218152 is an abundant number, since it is smaller than the sum of its proper divisors (40991788).

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

40218152 is a wasteful number, since it uses less digits than its factorization.

40218152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386732 (or 386728 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 40218152 is about 6341.7782994993. The cubic root of 40218152 is about 342.6157869484.

Adding to 40218152 its reverse (25181204), we get a palindrome (65399356).

The spelling of 40218152 in words is "forty million, two hundred eighteen thousand, one hundred fifty-two".