405984216852 has 48 divisors (see below), whose sum is σ = 1054619697600. Its totient is φ = 135062183520.

The previous prime is 405984216787. The next prime is 405984216889. The reversal of 405984216852 is 258612489504.

405984216852 is a `hidden beast` number, since 4 + 0 + 598 + 42 + 1 + 6 + 8 + 5 + 2 = 666.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3637674 + ... + 3747617.

It is an arithmetic number, because the mean of its divisors is an integer number (21971243700).

Almost surely, 2^405984216852 is an apocalyptic number.

It is an amenable number.

405984216852 is an abundant number, since it is smaller than the sum of its proper divisors (648635480748).

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

405984216852 is a wasteful number, since it uses less digits than its factorization.

405984216852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7385813 (or 7385805 counting only the distinct ones).

The product of its (nonzero) digits is 5529600, while the sum is 54.

The spelling of 405984216852 in words is "four hundred five billion, nine hundred eighty-four million, two hundred sixteen thousand, eight hundred fifty-two".