405786361 has 4 divisors (see below), whose sum is σ = 406112500. Its totient is φ = 405460224.

The previous prime is 405786343. The next prime is 405786421. The reversal of 405786361 is 163687504.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 167547136 + 238239225 = 12944^2 + 15435^2 .

It is a cyclic number.

It is not a de Polignac number, because 405786361 - 2¹³ = 405778169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (405786331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161196 + ... + 163693.

It is an arithmetic number, because the mean of its divisors is an integer number (101528125).

Almost surely, 2^405786361 is an apocalyptic number.

It is an amenable number.

405786361 is a deficient number, since it is larger than the sum of its proper divisors (326139).

405786361 is a wasteful number, since it uses less digits than its factorization.

405786361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326138.

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 405786361 is about 20144.1396192540. The cubic root of 405786361 is about 740.3421603703.

The spelling of 405786361 in words is "four hundred five million, seven hundred eighty-six thousand, three hundred sixty-one".