40212216 has 48 divisors (see below), whose sum is σ = 118811160. Its totient is φ = 12185280.

The previous prime is 40212209. The next prime is 40212251. The reversal of 40212216 is 61221204.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24595 + ... + 26178.

Almost surely, 2^40212216 is an apocalyptic number.

It is an amenable number.

40212216 is an abundant number, since it is smaller than the sum of its proper divisors (78598944).

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

40212216 is a wasteful number, since it uses less digits than its factorization.

40212216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50796 (or 50789 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 40212216 is about 6341.3102746988. The cubic root of 40212216 is about 342.5989299881.

The spelling of 40212216 in words is "forty million, two hundred twelve thousand, two hundred sixteen".