406803388 has 12 divisors (see below), whose sum is σ = 723576952. Its totient is φ = 200067120.

The previous prime is 406803379. The next prime is 406803389. The reversal of 406803388 is 883308604.

It is a happy number.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 406803388.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406803389) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 833370 + ... + 833857.

Almost surely, 2^406803388 is an apocalyptic number.

It is an amenable number.

406803388 is a deficient number, since it is larger than the sum of its proper divisors (316773564).

406803388 is a wasteful number, since it uses less digits than its factorization.

406803388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1667292 (or 1667290 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 40.

The square root of 406803388 is about 20169.3675656923. The cubic root of 406803388 is about 740.9601537056.

The spelling of 406803388 in words is "four hundred six million, eight hundred three thousand, three hundred eighty-eight".