405577345 has 4 divisors (see below), whose sum is σ = 486692820. Its totient is φ = 324461872.

The previous prime is 405577307. The next prime is 405577357. The reversal of 405577345 is 543775504.

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 179345664 + 226231681 = 13392^2 + 15041^2 .

It is a cyclic number.

It is not a de Polignac number, because 405577345 - 2⁹ = 405576833 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 405577298 and 405577307.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40557730 + ... + 40557739.

It is an arithmetic number, because the mean of its divisors is an integer number (121673205).

Almost surely, 2^405577345 is an apocalyptic number.

It is an amenable number.

405577345 is a deficient number, since it is larger than the sum of its proper divisors (81115475).

405577345 is an equidigital number, since it uses as much as digits as its factorization.

405577345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81115474.

The product of its (nonzero) digits is 294000, while the sum is 40.

The square root of 405577345 is about 20138.9509409006. The cubic root of 405577345 is about 740.2150245600.

The spelling of 405577345 in words is "four hundred five million, five hundred seventy-seven thousand, three hundred forty-five".