40400420247 has 32 divisors (see below), whose sum is σ = 65903880960. Its totient is φ = 24256251360.

The previous prime is 40400420237. The next prime is 40400420267. The reversal of 40400420247 is 74202400404.

It is not a de Polignac number, because 40400420247 - 2¹⁰ = 40400419223 is a prime.

It is a super-2 number, since 2×40400420247² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 40400420247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40400420237) 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 31 ways as a sum of consecutive naturals, for example, 603868 + ... + 667425.

It is an arithmetic number, because the mean of its divisors is an integer number (2059496280).

Almost surely, 2^40400420247 is an apocalyptic number.

40400420247 is a deficient number, since it is larger than the sum of its proper divisors (25503460713).

40400420247 is a wasteful number, since it uses less digits than its factorization.

40400420247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1271420 (or 1271414 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 27.

The spelling of 40400420247 in words is "forty billion, four hundred million, four hundred twenty thousand, two hundred forty-seven".