404210493 has 20 divisors (see below), whose sum is σ = 604503900. Its totient is φ = 269168832.

The previous prime is 404210491. The next prime is 404210537. The reversal of 404210493 is 394012404.

404210493 is a `hidden beast` number, since 404 + 210 + 49 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 206583129 + 197627364 = 14373^2 + 14058^2 .

It is not a de Polignac number, because 404210493 - 2¹ = 404210491 is a prime.

It is a super-2 number, since 2×404210493² = 326772245302606098, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404210491) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 86583 + ... + 91131.

It is an arithmetic number, because the mean of its divisors is an integer number (30225195).

Almost surely, 2^404210493 is an apocalyptic number.

It is an amenable number.

404210493 is a deficient number, since it is larger than the sum of its proper divisors (200293407).

404210493 is a wasteful number, since it uses less digits than its factorization.

404210493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5658 (or 5649 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 404210493 is about 20104.9867694560. The cubic root of 404210493 is about 739.3825461786.

Adding to 404210493 its reverse (394012404), we get a palindrome (798222897).

It can be divided in two parts, 4042 and 10493, that added together give a triangular number (14535 = T₁₇₀).

The spelling of 404210493 in words is "four hundred four million, two hundred ten thousand, four hundred ninety-three".