40136385 has 8 divisors (see below), whose sum is σ = 64218240. Its totient is φ = 21406064.

The previous prime is 40136339. The next prime is 40136387. The reversal of 40136385 is 58363104.

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 40136385 - 2⁹ = 40135873 is a prime.

It is a super-2 number, since 2×40136385² = 3221858801736450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40136387) 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, 1337865 + ... + 1337894.

It is an arithmetic number, because the mean of its divisors is an integer number (8027280).

Almost surely, 2^40136385 is an apocalyptic number.

It is an amenable number.

40136385 is a deficient number, since it is larger than the sum of its proper divisors (24081855).

40136385 is a wasteful number, since it uses less digits than its factorization.

40136385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2675767.

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

The square root of 40136385 is about 6335.3283261406. The cubic root of 40136385 is about 342.3834401883.

Adding to 40136385 its reverse (58363104), we get a palindrome (98499489).

The spelling of 40136385 in words is "forty million, one hundred thirty-six thousand, three hundred eighty-five".