40722309 has 6 divisors (see below), whose sum is σ = 58821126. Its totient is φ = 27148200.

The previous prime is 40722289. The next prime is 40722317. The reversal of 40722309 is 90322704.

It can be written as a sum of positive squares in only one way, i.e., 33005025 + 7717284 = 5745^2 + 2778^2 .

It is not a de Polignac number, because 40722309 - 2⁵ = 40722277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40722359) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2262342 + ... + 2262359.

It is an arithmetic number, because the mean of its divisors is an integer number (9803521).

Almost surely, 2^40722309 is an apocalyptic number.

It is an amenable number.

40722309 is a deficient number, since it is larger than the sum of its proper divisors (18098817).

40722309 is a wasteful number, since it uses less digits than its factorization.

40722309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4524707 (or 4524704 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 40722309 is about 6381.4033722999. The cubic root of 40722309 is about 344.0414729383.

The spelling of 40722309 in words is "forty million, seven hundred twenty-two thousand, three hundred nine".