40021616 has 10 divisors (see below), whose sum is σ = 77541912. Its totient is φ = 20010800.

The previous prime is 40021613. The next prime is 40021627. The reversal of 40021616 is 61612004.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40021613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1250660 + ... + 1250691.

Almost surely, 2^40021616 is an apocalyptic number.

It is an amenable number.

40021616 is a deficient number, since it is larger than the sum of its proper divisors (37520296).

40021616 is a wasteful number, since it uses less digits than its factorization.

40021616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2501359 (or 2501353 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 40021616 is about 6326.2639843750. The cubic root of 40021616 is about 342.0567829750.

The spelling of 40021616 in words is "forty million, twenty-one thousand, six hundred sixteen".