220454406 has 16 divisors (see below), whose sum is σ = 489898800. Its totient is φ = 73484784.

The previous prime is 220454387. The next prime is 220454449. The reversal of 220454406 is 604454022.

220454406 is a `hidden beast` number, since 2 + 204 + 54 + 406 = 666.

220454406 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 220454406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2041191 + ... + 2041298.

It is an arithmetic number, because the mean of its divisors is an integer number (30618675).

Almost surely, 2^220454406 is an apocalyptic number.

220454406 is an abundant number, since it is smaller than the sum of its proper divisors (269444394).

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

220454406 is a wasteful number, since it uses less digits than its factorization.

220454406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4082500 (or 4082494 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

The square root of 220454406 is about 14847.7070957101. The cubic root of 220454406 is about 604.0964186090.

The spelling of 220454406 in words is "two hundred twenty million, four hundred fifty-four thousand, four hundred six".