220194540 has 144 divisors (see below), whose sum is σ = 712569312. Its totient is φ = 54847488.

The previous prime is 220194521. The next prime is 220194563. The reversal of 220194540 is 45491022.

220194540 is a `hidden beast` number, since 2 + 201 + 9 + 454 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 694462 + ... + 694778.

It is an arithmetic number, because the mean of its divisors is an integer number (4948398).

Almost surely, 2^220194540 is an apocalyptic number.

220194540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 220194540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (356284656).

220194540 is an abundant number, since it is smaller than the sum of its proper divisors (492374772).

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

220194540 is a wasteful number, since it uses less digits than its factorization.

220194540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576 (or 571 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 220194540 is about 14838.9534671418. The cubic root of 220194540 is about 603.8589608263.

The spelling of 220194540 in words is "two hundred twenty million, one hundred ninety-four thousand, five hundred forty".