40073709 has 16 divisors (see below), whose sum is σ = 60927552. Its totient is φ = 23209728.

The previous prime is 40073653. The next prime is 40073711. The reversal of 40073709 is 90737004.

It is not a de Polignac number, because 40073709 - 2²⁵ = 6519277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40073729) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29559 + ... + 30884.

It is an arithmetic number, because the mean of its divisors is an integer number (3807972).

Almost surely, 2^40073709 is an apocalyptic number.

It is an amenable number.

40073709 is a deficient number, since it is larger than the sum of its proper divisors (20853843).

40073709 is a wasteful number, since it uses less digits than its factorization.

40073709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60476.

The product of its (nonzero) digits is 5292, while the sum is 30.

The square root of 40073709 is about 6330.3798464231. The cubic root of 40073709 is about 342.2051281300.

The spelling of 40073709 in words is "forty million, seventy-three thousand, seven hundred nine".