40752309 has 8 divisors (see below), whose sum is σ = 58516192. Its totient is φ = 25078320.

The previous prime is 40752307. The next prime is 40752317. The reversal of 40752309 is 90325704.

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

It is not a de Polignac number, because 40752309 - 2¹ = 40752307 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40752301) 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, 522427 + ... + 522504.

It is an arithmetic number, because the mean of its divisors is an integer number (7314524).

Almost surely, 2^40752309 is an apocalyptic number.

It is an amenable number.

40752309 is a deficient number, since it is larger than the sum of its proper divisors (17763883).

40752309 is a wasteful number, since it uses less digits than its factorization.

40752309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1044947.

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 40752309 is about 6383.7535196779. The cubic root of 40752309 is about 344.1259369658.

The spelling of 40752309 in words is "forty million, seven hundred fifty-two thousand, three hundred nine".