40648631 has 8 divisors (see below), whose sum is σ = 42278544. Its totient is φ = 39049920.

The previous prime is 40648627. The next prime is 40648639. The reversal of 40648631 is 13684604.

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 40648631 - 2² = 40648627 is a prime.

It is a super-2 number, since 2×40648631² = 3304622404348322, 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 (40648639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5126 + ... + 10371.

It is an arithmetic number, because the mean of its divisors is an integer number (5284818).

Almost surely, 2^40648631 is an apocalyptic number.

40648631 is a deficient number, since it is larger than the sum of its proper divisors (1629913).

40648631 is a wasteful number, since it uses less digits than its factorization.

40648631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15601.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 40648631 is about 6375.6278906473. The cubic root of 40648631 is about 343.8338587254.

The spelling of 40648631 in words is "forty million, six hundred forty-eight thousand, six hundred thirty-one".