220378438 has 16 divisors (see below), whose sum is σ = 388003104. Its totient is φ = 91895040.

The previous prime is 220378409. The next prime is 220378447. The reversal of 220378438 is 834873022.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a junction number, because it is equal to n+sod(n) for n = 220378397 and 220378406.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 212203 + ... + 213238.

It is an arithmetic number, because the mean of its divisors is an integer number (24250194).

Almost surely, 2^220378438 is an apocalyptic number.

220378438 is a deficient number, since it is larger than the sum of its proper divisors (167624666).

220378438 is a wasteful number, since it uses less digits than its factorization.

220378438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425487.

The product of its (nonzero) digits is 64512, while the sum is 37.

The square root of 220378438 is about 14845.1486351602. The cubic root of 220378438 is about 604.0270206323.

The spelling of 220378438 in words is "two hundred twenty million, three hundred seventy-eight thousand, four hundred thirty-eight".