404140306 has 4 divisors (see below), whose sum is σ = 606210462. Its totient is φ = 202070152.

The previous prime is 404140277. The next prime is 404140349. The reversal of 404140306 is 603041404.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 254689681 + 149450625 = 15959^2 + 12225^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101035075 + ... + 101035078.

Almost surely, 2^404140306 is an apocalyptic number.

404140306 is a deficient number, since it is larger than the sum of its proper divisors (202070156).

404140306 is a wasteful number, since it uses less digits than its factorization.

404140306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202070155.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 404140306 is about 20103.2411814613. The cubic root of 404140306 is about 739.3397483066.

The spelling of 404140306 in words is "four hundred four million, one hundred forty thousand, three hundred six".