40355613 has 6 divisors (see below), whose sum is σ = 58291454. Its totient is φ = 26903736.

The previous prime is 40355597. The next prime is 40355633. The reversal of 40355613 is 31655304.

40355613 is a `hidden beast` number, since 40 + 3 + 5 + 5 + 613 = 666.

It can be written as a sum of positive squares in only one way, i.e., 31337604 + 9018009 = 5598^2 + 3003^2 .

It is not a de Polignac number, because 40355613 - 2⁴ = 40355597 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 (40355633) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2241970 + ... + 2241987.

Almost surely, 2^40355613 is an apocalyptic number.

It is an amenable number.

40355613 is a deficient number, since it is larger than the sum of its proper divisors (17935841).

40355613 is a wasteful number, since it uses less digits than its factorization.

40355613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4483963 (or 4483960 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 40355613 is about 6352.6067877683. The cubic root of 40355613 is about 343.0056834787.

The spelling of 40355613 in words is "forty million, three hundred fifty-five thousand, six hundred thirteen".