40653813 has 8 divisors (see below), whose sum is σ = 54742176. Its totient is φ = 26834000.

The previous prime is 40653797. The next prime is 40653827. The reversal of 40653813 is 31835604.

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 40653813 - 2⁴ = 40653797 is a prime.

It is a super-2 number, since 2×40653813² = 3305465022877938, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40653413) 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, 66783 + ... + 67388.

It is an arithmetic number, because the mean of its divisors is an integer number (6842772).

Almost surely, 2^40653813 is an apocalyptic number.

It is an amenable number.

40653813 is a deficient number, since it is larger than the sum of its proper divisors (14088363).

40653813 is a wasteful number, since it uses less digits than its factorization.

40653813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134275.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 40653813 is about 6376.0342690422. The cubic root of 40653813 is about 343.8484690685.

The spelling of 40653813 in words is "forty million, six hundred fifty-three thousand, eight hundred thirteen".