220238464 has 16 divisors (see below), whose sum is σ = 438756570. Its totient is φ = 110119168.

The previous prime is 220238449. The next prime is 220238489. The reversal of 220238464 is 464832022.

It can be written as a sum of positive squares in only one way, i.e., 197121600 + 23116864 = 14040^2 + 4808^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 860179 + ... + 860434.

Almost surely, 2^220238464 is an apocalyptic number.

It is an amenable number.

220238464 is a deficient number, since it is larger than the sum of its proper divisors (218518106).

220238464 is an equidigital number, since it uses as much as digits as its factorization.

220238464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1720627 (or 1720615 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 31.

The square root of 220238464 is about 14840.4334168514. The cubic root of 220238464 is about 603.8991103800.

The spelling of 220238464 in words is "two hundred twenty million, two hundred thirty-eight thousand, four hundred sixty-four".