204400534 has 16 divisors (see below), whose sum is σ = 333593568. Its totient is φ = 93364992.

The previous prime is 204400529. The next prime is 204400541. The reversal of 204400534 is 435004402.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38002 + ... + 43045.

It is an arithmetic number, because the mean of its divisors is an integer number (20849598).

Almost surely, 2^204400534 is an apocalyptic number.

204400534 is a deficient number, since it is larger than the sum of its proper divisors (129193034).

204400534 is a wasteful number, since it uses less digits than its factorization.

204400534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81159.

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 204400534 is about 14296.8714759558. The cubic root of 204400534 is about 589.0615493689.

Adding to 204400534 its reverse (435004402), we get a palindrome (639404936).

It can be divided in two parts, 204 and 400534, that multiplied together give a triangular number (81708936 = T₁₂₇₈₃).

The spelling of 204400534 in words is "two hundred four million, four hundred thousand, five hundred thirty-four".