225978406 has 16 divisors (see below), whose sum is σ = 352585728. Its totient is φ = 108505800.

The previous prime is 225978377. The next prime is 225978407. The reversal of 225978406 is 604879522.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225978407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5790 + ... + 22033.

It is an arithmetic number, because the mean of its divisors is an integer number (22036608).

Almost surely, 2^225978406 is an apocalyptic number.

225978406 is a deficient number, since it is larger than the sum of its proper divisors (126607322).

225978406 is a wasteful number, since it uses less digits than its factorization.

225978406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27987.

The product of its (nonzero) digits is 241920, while the sum is 43.

The square root of 225978406 is about 15032.5781554596. The cubic root of 225978406 is about 609.1005340737.

The spelling of 225978406 in words is "two hundred twenty-five million, nine hundred seventy-eight thousand, four hundred six".