405800493 has 16 divisors (see below), whose sum is σ = 633446016. Its totient is φ = 226229760.

The previous prime is 405800443. The next prime is 405800519. The reversal of 405800493 is 394008504.

It is not a de Polignac number, because 405800493 - 2⁸ = 405800237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405800413) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 234796 + ... + 236517.

It is an arithmetic number, because the mean of its divisors is an integer number (39590376).

Almost surely, 2^405800493 is an apocalyptic number.

It is an amenable number.

405800493 is a deficient number, since it is larger than the sum of its proper divisors (227645523).

405800493 is a wasteful number, since it uses less digits than its factorization.

405800493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471364.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 405800493 is about 20144.4903881930. The cubic root of 405800493 is about 740.3507547071.

Adding to 405800493 its reverse (394008504), we get a palindrome (799808997).

The spelling of 405800493 in words is "four hundred five million, eight hundred thousand, four hundred ninety-three".