40135813 has 8 divisors (see below), whose sum is σ = 41174496. Its totient is φ = 39102000.

The previous prime is 40135811. The next prime is 40135817. The reversal of 40135813 is 31853104.

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 40135813 - 2¹ = 40135811 is a prime.

It is a super-2 number, since 2×40135813² = 3221766970341938, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40135811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20163 + ... + 22063.

It is an arithmetic number, because the mean of its divisors is an integer number (5146812).

Almost surely, 2^40135813 is an apocalyptic number.

40135813 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

It is an amenable number.

40135813 is a deficient number, since it is larger than the sum of its proper divisors (1038683).

40135813 is a wasteful number, since it uses less digits than its factorization.

40135813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2435.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 40135813 is about 6335.2831823053. The cubic root of 40135813 is about 342.3818136986.

Adding to 40135813 its reverse (31853104), we get a palindrome (71988917).

The spelling of 40135813 in words is "forty million, one hundred thirty-five thousand, eight hundred thirteen".