405808335378 has 24 divisors (see below), whose sum is σ = 879280499916. Its totient is φ = 135264967200.

The previous prime is 405808335287. The next prime is 405808335473. The reversal of 405808335378 is 873533808504.

405808335378 is a `hidden beast` number, since 4 + 0 + 580 + 8 + 3 + 3 + 53 + 7 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 299234162529 + 106574172849 = 547023^2 + 326457^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 210348 + ... + 925128.

Almost surely, 2^405808335378 is an apocalyptic number.

405808335378 is an abundant number, since it is smaller than the sum of its proper divisors (473472164538).

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

405808335378 is a wasteful number, since it uses less digits than its factorization.

405808335378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 746330 (or 746327 counting only the distinct ones).

The product of its (nonzero) digits is 9676800, while the sum is 54.

The spelling of 405808335378 in words is "four hundred five billion, eight hundred eight million, three hundred thirty-five thousand, three hundred seventy-eight".