40001216 has 28 divisors (see below), whose sum is σ = 79644240. Its totient is φ = 19933440.

The previous prime is 40001197. The next prime is 40001231. The reversal of 40001216 is 61210004.

It is a self number, because there is not a number n which added to its sum of digits gives 40001216.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22106 + ... + 23846.

Almost surely, 2^40001216 is an apocalyptic number.

It is an amenable number.

40001216 is a deficient number, since it is larger than the sum of its proper divisors (39643024).

40001216 is a wasteful number, since it uses less digits than its factorization.

40001216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2112 (or 2102 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 40001216 is about 6324.6514528470. The cubic root of 40001216 is about 341.9986548515.

The spelling of 40001216 in words is "forty million, one thousand, two hundred sixteen".