40136481 has 24 divisors (see below), whose sum is σ = 72281664. Its totient is φ = 20849760.

The previous prime is 40136477. The next prime is 40136483. The reversal of 40136481 is 18463104.

40136481 is a `hidden beast` number, since 4 + 0 + 13 + 648 + 1 = 666.

It is not a de Polignac number, because 40136481 - 2² = 40136477 is a prime.

It is a super-2 number, since 2×40136481² = 3221874214126722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40136483) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28266 + ... + 29651.

It is an arithmetic number, because the mean of its divisors is an integer number (3011736).

Almost surely, 2^40136481 is an apocalyptic number.

It is an amenable number.

40136481 is a deficient number, since it is larger than the sum of its proper divisors (32145183).

40136481 is a wasteful number, since it uses less digits than its factorization.

40136481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57941 (or 57938 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 40136481 is about 6335.3359026969. The cubic root of 40136481 is about 342.3837131641.

Adding to 40136481 its reverse (18463104), we get a palindrome (58599585).

The spelling of 40136481 in words is "forty million, one hundred thirty-six thousand, four hundred eighty-one".