399838515236 has 12 divisors (see below), whose sum is σ = 701699606412. Its totient is φ = 199352913408.

The previous prime is 399838515221. The next prime is 399838515301. The reversal of 399838515236 is 632515838993.

It can be written as a sum of positive squares in 2 ways, for example, as 91875672100 + 307962843136 = 303110^2 + 554944^2 .

It is a super-2 number, since 2×399838515236² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141584465 + ... + 141587288.

It is an arithmetic number, because the mean of its divisors is an integer number (58474967201).

Almost surely, 2^399838515236 is an apocalyptic number.

It is an amenable number.

399838515236 is a deficient number, since it is larger than the sum of its proper divisors (301861091176).

399838515236 is a wasteful number, since it uses less digits than its factorization.

399838515236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283172110 (or 283172108 counting only the distinct ones).

The product of its digits is 41990400, while the sum is 62.

The spelling of 399838515236 in words is "three hundred ninety-nine billion, eight hundred thirty-eight million, five hundred fifteen thousand, two hundred thirty-six".