405223894 has 4 divisors (see below), whose sum is σ = 607835844. Its totient is φ = 202611946.

The previous prime is 405223891. The next prime is 405223919. The reversal of 405223894 is 498322504.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405223891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101305972 + ... + 101305975.

It is an arithmetic number, because the mean of its divisors is an integer number (151958961).

Almost surely, 2^405223894 is an apocalyptic number.

405223894 is a deficient number, since it is larger than the sum of its proper divisors (202611950).

405223894 is a wasteful number, since it uses less digits than its factorization.

405223894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202611949.

The product of its (nonzero) digits is 69120, while the sum is 37.

The square root of 405223894 is about 20130.1737200651. The cubic root of 405223894 is about 739.9999354760. Note that the first 4 decimals are identical.

The spelling of 405223894 in words is "four hundred five million, two hundred twenty-three thousand, eight hundred ninety-four".