40000216 has 16 divisors (see below), whose sum is σ = 75315240. Its totient is φ = 19916160.

The previous prime is 40000211. The next prime is 40000217. The reversal of 40000216 is 61200004.

40000216 is a modest number, since divided by 216 gives 40 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 40000196 and 40000205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40000211) 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, 8446 + ... + 12301.

Almost surely, 2^40000216 is an apocalyptic number.

It is an amenable number.

40000216 is a deficient number, since it is larger than the sum of its proper divisors (35315024).

40000216 is a wasteful number, since it uses less digits than its factorization.

40000216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20994 (or 20990 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 40000216 is about 6324.5723966131. The cubic root of 40000216 is about 341.9958049256.

The spelling of 40000216 in words is "forty million, two hundred sixteen", and thus it is an aban number.