40405308 has 12 divisors (see below), whose sum is σ = 94279080. Its totient is φ = 13468432.

The previous prime is 40405237. The next prime is 40405331. The reversal of 40405308 is 80350404.

It is a happy number.

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

It is a congruent number.

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, 1683543 + ... + 1683566.

It is an arithmetic number, because the mean of its divisors is an integer number (7856590).

Almost surely, 2^40405308 is an apocalyptic number.

It is an amenable number.

40405308 is an abundant number, since it is smaller than the sum of its proper divisors (53873772).

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

40405308 is a wasteful number, since it uses less digits than its factorization.

40405308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3367116 (or 3367114 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 40405308 is about 6356.5169707946. The cubic root of 40405308 is about 343.1464212359.

The spelling of 40405308 in words is "forty million, four hundred five thousand, three hundred eight".