204780030 has 64 divisors (see below), whose sum is σ = 604896768. Its totient is φ = 43205760.

The previous prime is 204780019. The next prime is 204780067. The reversal of 204780030 is 30087402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34776 + ... + 40235.

It is an arithmetic number, because the mean of its divisors is an integer number (9451512).

Almost surely, 2^204780030 is an apocalyptic number.

204780030 is an abundant number, since it is smaller than the sum of its proper divisors (400116738).

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

204780030 is a wasteful number, since it uses less digits than its factorization.

204780030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75041.

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 204780030 is about 14310.1373159030. The cubic root of 204780030 is about 589.4258802771.

The spelling of 204780030 in words is "two hundred four million, seven hundred eighty thousand, thirty".