40648791 has 8 divisors (see below), whose sum is σ = 54295920. Its totient is φ = 27050432.

The previous prime is 40648757. The next prime is 40648823. The reversal of 40648791 is 19784604.

It is a happy number.

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 40648791 - 2¹³ = 40640599 is a prime.

It is a super-3 number, since 3×40648791³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40648891) 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, 10200 + ... + 13613.

It is an arithmetic number, because the mean of its divisors is an integer number (6786990).

Almost surely, 2^40648791 is an apocalyptic number.

40648791 is a deficient number, since it is larger than the sum of its proper divisors (13647129).

40648791 is a wasteful number, since it uses less digits than its factorization.

40648791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24385.

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 40648791 is about 6375.6404384187. The cubic root of 40648791 is about 343.8343098545.

The spelling of 40648791 in words is "forty million, six hundred forty-eight thousand, seven hundred ninety-one".