406548394 has 12 divisors (see below), whose sum is σ = 709385634. Its totient is φ = 174234984.

The previous prime is 406548277. The next prime is 406548403. The reversal of 406548394 is 493845604.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 395492769 + 11055625 = 19887^2 + 3325^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 406548394.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2074129 + ... + 2074324.

Almost surely, 2^406548394 is an apocalyptic number.

406548394 is a deficient number, since it is larger than the sum of its proper divisors (302837240).

406548394 is a wasteful number, since it uses less digits than its factorization.

406548394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4148469 (or 4148462 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 43.

The square root of 406548394 is about 20163.0452561115. The cubic root of 406548394 is about 740.8053042213.

The spelling of 406548394 in words is "four hundred six million, five hundred forty-eight thousand, three hundred ninety-four".