40405307 has 8 divisors (see below), whose sum is σ = 41812992. Its totient is φ = 39004200.

The previous prime is 40405237. The next prime is 40405331. The reversal of 40405307 is 70350404.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40405307 - 2⁸ = 40405051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40405357) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13082 + ... + 15872.

It is an arithmetic number, because the mean of its divisors is an integer number (5226624).

Almost surely, 2^40405307 is an apocalyptic number.

40405307 is a deficient number, since it is larger than the sum of its proper divisors (1407685).

40405307 is a wasteful number, since it uses less digits than its factorization.

40405307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3289.

The product of its (nonzero) digits is 1680, while the sum is 23.

The square root of 40405307 is about 6356.5168921352. The cubic root of 40405307 is about 343.1464184050.

The spelling of 40405307 in words is "forty million, four hundred five thousand, three hundred seven".