40736491 has 4 divisors (see below), whose sum is σ = 41427000. Its totient is φ = 40045984.

The previous prime is 40736459. The next prime is 40736497. The reversal of 40736491 is 19463704.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40736491 - 2⁵ = 40736459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40736497) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 345166 + ... + 345283.

It is an arithmetic number, because the mean of its divisors is an integer number (10356750).

Almost surely, 2^40736491 is an apocalyptic number.

40736491 is a deficient number, since it is larger than the sum of its proper divisors (690509).

40736491 is an equidigital number, since it uses as much as digits as its factorization.

40736491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 690508.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 40736491 is about 6382.5144731524. The cubic root of 40736491 is about 344.0814070677.

The spelling of 40736491 in words is "forty million, seven hundred thirty-six thousand, four hundred ninety-one".