40720085 has 8 divisors (see below), whose sum is σ = 55844736. Its totient is φ = 27922320.

The previous prime is 40720079. The next prime is 40720087. The reversal of 40720085 is 58002704.

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

It is not a de Polignac number, because 40720085 - 2⁸ = 40719829 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 (40720087) 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, 581681 + ... + 581750.

It is an arithmetic number, because the mean of its divisors is an integer number (6980592).

Almost surely, 2^40720085 is an apocalyptic number.

It is an amenable number.

40720085 is a deficient number, since it is larger than the sum of its proper divisors (15124651).

40720085 is a wasteful number, since it uses less digits than its factorization.

40720085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1163443.

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 40720085 is about 6381.2291135799. The cubic root of 40720085 is about 344.0352096870.

Adding to 40720085 its reverse (58002704), we get a palindrome (98722789).

The spelling of 40720085 in words is "forty million, seven hundred twenty thousand, eighty-five".