405879746 has 8 divisors (see below), whose sum is σ = 623669004. Its totient is φ = 197990080.

The previous prime is 405879713. The next prime is 405879757. The reversal of 405879746 is 647978504.

It can be written as a sum of positive squares in 2 ways, for example, as 403809025 + 2070721 = 20095^2 + 1439^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×405879746³ (a number of 27 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 405879694 and 405879703.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2474795 + ... + 2474958.

Almost surely, 2^405879746 is an apocalyptic number.

405879746 is a deficient number, since it is larger than the sum of its proper divisors (217789258).

405879746 is a wasteful number, since it uses less digits than its factorization.

405879746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4949796.

The product of its (nonzero) digits is 1693440, while the sum is 50.

The square root of 405879746 is about 20146.4574057078. The cubic root of 405879746 is about 740.3989485035.

The spelling of 405879746 in words is "four hundred five million, eight hundred seventy-nine thousand, seven hundred forty-six".