204427720 has 128 divisors (see below), whose sum is σ = 565781760. Its totient is φ = 64880640.

The previous prime is 204427679. The next prime is 204427753. The reversal of 204427720 is 27724402.

It is a Harshad number since it is a multiple of its sum of digits (28).

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 31 ways as a sum of consecutive naturals, for example, 318600 + ... + 319240.

It is an arithmetic number, because the mean of its divisors is an integer number (4420170).

Almost surely, 2^204427720 is an apocalyptic number.

204427720 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 204427720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (282890880).

204427720 is an abundant number, since it is smaller than the sum of its proper divisors (361354040).

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

204427720 is a wasteful number, since it uses less digits than its factorization.

204427720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 743 (or 739 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 28.

The square root of 204427720 is about 14297.8222117916. The cubic root of 204427720 is about 589.0876639734.

The spelling of 204427720 in words is "two hundred four million, four hundred twenty-seven thousand, seven hundred twenty".