220865394 has 32 divisors (see below), whose sum is σ = 468357120. Its totient is φ = 69196032.

The previous prime is 220865383. The next prime is 220865399. The reversal of 220865394 is 493568022.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (220865399) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 129612 + ... + 131304.

It is an arithmetic number, because the mean of its divisors is an integer number (14636160).

Almost surely, 2^220865394 is an apocalyptic number.

220865394 is an abundant number, since it is smaller than the sum of its proper divisors (247491726).

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

220865394 is a wasteful number, since it uses less digits than its factorization.

220865394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2994.

The product of its (nonzero) digits is 103680, while the sum is 39.

The square root of 220865394 is about 14861.5407680361. The cubic root of 220865394 is about 604.4715865144.

The spelling of 220865394 in words is "two hundred twenty million, eight hundred sixty-five thousand, three hundred ninety-four".