40720613 has 8 divisors (see below), whose sum is σ = 41808096. Its totient is φ = 39639600.

The previous prime is 40720607. The next prime is 40720633. The reversal of 40720613 is 31602704.

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 40720613 - 2⁶ = 40720549 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 (40720633) 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, 12803 + ... + 15663.

It is an arithmetic number, because the mean of its divisors is an integer number (5226012).

Almost surely, 2^40720613 is an apocalyptic number.

40720613 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

It is an amenable number.

40720613 is a deficient number, since it is larger than the sum of its proper divisors (1087483).

40720613 is a wasteful number, since it uses less digits than its factorization.

40720613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3235.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 40720613 is about 6381.2704847859. The cubic root of 40720613 is about 344.0366966666.

The spelling of 40720613 in words is "forty million, seven hundred twenty thousand, six hundred thirteen".