40070709 has 12 divisors (see below), whose sum is σ = 66148576. Its totient is φ = 22897512.

The previous prime is 40070707. The next prime is 40070713. The reversal of 40070709 is 90707004.

It is not a de Polignac number, because 40070709 - 2¹ = 40070707 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40070707) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 317959 + ... + 318084.

Almost surely, 2^40070709 is an apocalyptic number.

It is an amenable number.

40070709 is a deficient number, since it is larger than the sum of its proper divisors (26077867).

40070709 is a wasteful number, since it uses less digits than its factorization.

40070709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636056 (or 636053 counting only the distinct ones).

The product of its (nonzero) digits is 1764, while the sum is 27.

The square root of 40070709 is about 6330.1428893825. The cubic root of 40070709 is about 342.1965885245.

The spelling of 40070709 in words is "forty million, seventy thousand, seven hundred nine".