399524238652 has 576 divisors, whose sum is σ = 1004214435840. Its totient is φ = 135509552640.

The previous prime is 399524238649. The next prime is 399524238683. The reversal of 399524238652 is 256832425993.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 4813545003 + ... + 4813545085.

It is an arithmetic number, because the mean of its divisors is an integer number (1743427840).

Almost surely, 2^399524238652 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 399524238652, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (502107217920).

399524238652 is an abundant number, since it is smaller than the sum of its proper divisors (604690197188).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

399524238652 is a wasteful number, since it uses less digits than its factorization.

399524238652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262 (or 249 counting only the distinct ones).

The product of its digits is 27993600, while the sum is 58.

The spelling of 399524238652 in words is "three hundred ninety-nine billion, five hundred twenty-four million, two hundred thirty-eight thousand, six hundred fifty-two".