40090709 has 8 divisors (see below), whose sum is σ = 42674688. Its totient is φ = 37531840.

The previous prime is 40090693. The next prime is 40090727. The reversal of 40090709 is 90709004.

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

It is a cyclic number.

It is not a de Polignac number, because 40090709 - 2⁴ = 40090693 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 (40090759) 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, 2927 + ... + 9420.

It is an arithmetic number, because the mean of its divisors is an integer number (5334336).

Almost surely, 2^40090709 is an apocalyptic number.

It is an amenable number.

40090709 is a deficient number, since it is larger than the sum of its proper divisors (2583979).

40090709 is a wasteful number, since it uses less digits than its factorization.

40090709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12555.

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 40090709 is about 6331.7224354831. The cubic root of 40090709 is about 342.2535111796.

The spelling of 40090709 in words is "forty million, ninety thousand, seven hundred nine".