40632709 has 4 divisors (see below), whose sum is σ = 43758316. Its totient is φ = 37507104.

The previous prime is 40632701. The next prime is 40632731. The reversal of 40632709 is 90723604.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25250625 + 15382084 = 5025^2 + 3922^2 .

It is a cyclic number.

It is not a de Polignac number, because 40632709 - 2³ = 40632701 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 (40632701) 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, 1562784 + ... + 1562809.

It is an arithmetic number, because the mean of its divisors is an integer number (10939579).

Almost surely, 2^40632709 is an apocalyptic number.

It is an amenable number.

40632709 is a deficient number, since it is larger than the sum of its proper divisors (3125607).

40632709 is a wasteful number, since it uses less digits than its factorization.

40632709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3125606.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 40632709 is about 6374.3791070190. The cubic root of 40632709 is about 343.7889598156.

The spelling of 40632709 in words is "forty million, six hundred thirty-two thousand, seven hundred nine".