40218672 has 40 divisors (see below), whose sum is σ = 111892144. Its totient is φ = 12374784.

The previous prime is 40218671. The next prime is 40218683. The reversal of 40218672 is 27681204.

It is not an unprimeable number, because it can be changed into a prime (40218671) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31603 + ... + 32850.

Almost surely, 2^40218672 is an apocalyptic number.

It is an amenable number.

40218672 is an abundant number, since it is smaller than the sum of its proper divisors (71673472).

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

40218672 is a wasteful number, since it uses less digits than its factorization.

40218672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64477 (or 64471 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 40218672 is about 6341.8192973310. The cubic root of 40218672 is about 342.6172635573.

Adding to 40218672 its reverse (27681204), we get a palindrome (67899876).

The spelling of 40218672 in words is "forty million, two hundred eighteen thousand, six hundred seventy-two".