40004004399 has 32 divisors (see below), whose sum is σ = 54089856000. Its totient is φ = 26297232000.

The previous prime is 40004004371. The next prime is 40004004401. The reversal of 40004004399 is 99340040004.

It is a happy number.

It is not a de Polignac number, because 40004004399 - 2²⁴ = 39987227183 is a prime.

It is a super-2 number, since 2×40004004399² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40004004199) 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 31 ways as a sum of consecutive naturals, for example, 53267274 + ... + 53268024.

It is an arithmetic number, because the mean of its divisors is an integer number (1690308000).

Almost surely, 2^40004004399 is an apocalyptic number.

40004004399 is a deficient number, since it is larger than the sum of its proper divisors (14085851601).

40004004399 is a wasteful number, since it uses less digits than its factorization.

40004004399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1615.

The product of its (nonzero) digits is 15552, while the sum is 33.

The spelling of 40004004399 in words is "forty billion, four million, four thousand, three hundred ninety-nine".