225678690 has 32 divisors (see below), whose sum is σ = 601810560. Its totient is φ = 60180912.

The previous prime is 225678679. The next prime is 225678721. The reversal of 225678690 is 96876522.

225678690 is a `hidden beast` number, since 2 + 2 + 567 + 86 + 9 + 0 = 666.

It is a super-2 number, since 2×225678690² = 101861742240232200, which contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 417654 + ... + 418193.

It is an arithmetic number, because the mean of its divisors is an integer number (18806580).

Almost surely, 2^225678690 is an apocalyptic number.

225678690 is an abundant number, since it is smaller than the sum of its proper divisors (376131870).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

225678690 is a wasteful number, since it uses less digits than its factorization.

225678690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 835863 (or 835857 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 225678690 is about 15022.6059656772. The cubic root of 225678690 is about 608.8311308341.

The spelling of 225678690 in words is "two hundred twenty-five million, six hundred seventy-eight thousand, six hundred ninety".