204457140 has 36 divisors (see below), whose sum is σ = 620187204. Its totient is φ = 54521856.

The previous prime is 204457117. The next prime is 204457207. The reversal of 204457140 is 41754402.

204457140 is a `hidden beast` number, since 204 + 457 + 1 + 4 + 0 = 666.

204457140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 71470116 + 132987024 = 8454^2 + 11532^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 567757 + ... + 568116.

Almost surely, 2^204457140 is an apocalyptic number.

204457140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204457140 is an abundant number, since it is smaller than the sum of its proper divisors (415730064).

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

204457140 is a wasteful number, since it uses less digits than its factorization.

204457140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1135888 (or 1135883 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 27.

The square root of 204457140 is about 14298.8510027904. The cubic root of 204457140 is about 589.1159219281.

The spelling of 204457140 in words is "two hundred four million, four hundred fifty-seven thousand, one hundred forty".