405700385 has 8 divisors (see below), whose sum is σ = 487176360. Its totient is φ = 324336384.

The previous prime is 405700367. The next prime is 405700391. The reversal of 405700385 is 583007504.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 564001 + 405136384 = 751^2 + 20128^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 405700385 - 2¹⁰ = 405699361 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19802 + ... + 34691.

It is an arithmetic number, because the mean of its divisors is an integer number (60897045).

Almost surely, 2^405700385 is an apocalyptic number.

It is an amenable number.

405700385 is a deficient number, since it is larger than the sum of its proper divisors (81475975).

405700385 is a wasteful number, since it uses less digits than its factorization.

405700385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55987.

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 405700385 is about 20142.0054860483. The cubic root of 405700385 is about 740.2898700030.

Adding to 405700385 its reverse (583007504), we get a palindrome (988707889).

The spelling of 405700385 in words is "four hundred five million, seven hundred thousand, three hundred eighty-five".