40065684 has 12 divisors (see below), whose sum is σ = 93486624. Its totient is φ = 13355224.

The previous prime is 40065679. The next prime is 40065689. The reversal of 40065684 is 48656004.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (40065679) and next prime (40065689).

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40065689) 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, 1669392 + ... + 1669415.

It is an arithmetic number, because the mean of its divisors is an integer number (7790552).

Almost surely, 2^40065684 is an apocalyptic number.

It is an amenable number.

40065684 is an abundant number, since it is smaller than the sum of its proper divisors (53420940).

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

40065684 is a wasteful number, since it uses less digits than its factorization.

40065684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3338814 (or 3338812 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 40065684 is about 6329.7459664666. The cubic root of 40065684 is about 342.1822837302.

The spelling of 40065684 in words is "forty million, sixty-five thousand, six hundred eighty-four".