399989990529 has 12 divisors (see below), whose sum is σ = 591199676496. Its totient is φ = 260458598232.

The previous prime is 399989990513. The next prime is 399989990581. The reversal of 399989990529 is 925099989993.

399989990529 is a `hidden beast` number, since 3 + 9 + 9 + 9 + 89 + 9 + 9 + 0 + 529 = 666.

It is not a de Polignac number, because 399989990529 - 2⁴ = 399989990513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (399989990599) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 516782547 + ... + 516783320.

It is an arithmetic number, because the mean of its divisors is an integer number (49266639708).

Almost surely, 2^399989990529 is an apocalyptic number.

It is an amenable number.

399989990529 is a deficient number, since it is larger than the sum of its proper divisors (191209685967).

399989990529 is a wasteful number, since it uses less digits than its factorization.

399989990529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1033565916 (or 1033565913 counting only the distinct ones).

The product of its (nonzero) digits is 1147912560, while the sum is 81.

The spelling of 399989990529 in words is "three hundred ninety-nine billion, nine hundred eighty-nine million, nine hundred ninety thousand, five hundred twenty-nine".