226405399 has 12 divisors (see below), whose sum is σ = 259681968. Its totient is φ = 196871840.

The previous prime is 226405379. The next prime is 226405423. The reversal of 226405399 is 993504622.

It is not a de Polignac number, because 226405399 - 2⁵ = 226405367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (226405379) 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 11 ways as a sum of consecutive naturals, for example, 37894 + ... + 43459.

It is an arithmetic number, because the mean of its divisors is an integer number (21640164).

Almost surely, 2^226405399 is an apocalyptic number.

226405399 is a deficient number, since it is larger than the sum of its proper divisors (33276569).

226405399 is a wasteful number, since it uses less digits than its factorization.

226405399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81398 (or 81387 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 40.

The square root of 226405399 is about 15046.7737073434. The cubic root of 226405399 is about 609.4839306261.

The spelling of 226405399 in words is "two hundred twenty-six million, four hundred five thousand, three hundred ninety-nine".