40288310923 has 24 divisors (see below), whose sum is σ = 50924037120. Its totient is φ = 31659964560.

The previous prime is 40288310917. The next prime is 40288310941. The reversal of 40288310923 is 32901388204.

It is a de Polignac number, because none of the positive numbers 2^k-40288310923 is a prime.

It is a super-2 number, since 2×40288310923² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40288310963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 669111 + ... + 726832.

It is an arithmetic number, because the mean of its divisors is an integer number (2121834880).

Almost surely, 2^40288310923 is an apocalyptic number.

40288310923 is a deficient number, since it is larger than the sum of its proper divisors (10635726197).

40288310923 is a wasteful number, since it uses less digits than its factorization.

40288310923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1396007 (or 1396000 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 40.

The spelling of 40288310923 in words is "forty billion, two hundred eighty-eight million, three hundred ten thousand, nine hundred twenty-three".