399093881652 has 48 divisors (see below), whose sum is σ = 1070366740800. Its totient is φ = 128444006880.

The previous prime is 399093881639. The next prime is 399093881657. The reversal of 399093881652 is 256188390993.

399093881652 is a `hidden beast` number, since 3 + 9 + 90 + 9 + 388 + 165 + 2 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 399093881652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399093881657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63709174 + ... + 63715437.

It is an arithmetic number, because the mean of its divisors is an integer number (22299307100).

Almost surely, 2^399093881652 is an apocalyptic number.

It is an amenable number.

399093881652 is an abundant number, since it is smaller than the sum of its proper divisors (671272859148).

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

399093881652 is a wasteful number, since it uses less digits than its factorization.

399093881652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127424653 (or 127424645 counting only the distinct ones).

The product of its (nonzero) digits is 25194240, while the sum is 63.

The spelling of 399093881652 in words is "three hundred ninety-nine billion, ninety-three million, eight hundred eighty-one thousand, six hundred fifty-two".