404572394 has 4 divisors (see below), whose sum is σ = 606858594. Its totient is φ = 202286196.

The previous prime is 404572391. The next prime is 404572397. The reversal of 404572394 is 493275404.

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

It is an interprime number because it is at equal distance from previous prime (404572391) and next prime (404572397).

It can be written as a sum of positive squares in only one way, i.e., 224610169 + 179962225 = 14987^2 + 13415^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (404572391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101143097 + ... + 101143100.

Almost surely, 2^404572394 is an apocalyptic number.

404572394 is a deficient number, since it is larger than the sum of its proper divisors (202286200).

404572394 is a wasteful number, since it uses less digits than its factorization.

404572394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202286199.

The product of its (nonzero) digits is 120960, while the sum is 38.

The square root of 404572394 is about 20113.9850352932. The cubic root of 404572394 is about 739.6031436716.

The spelling of 404572394 in words is "four hundred four million, five hundred seventy-two thousand, three hundred ninety-four".