204138772 has 24 divisors (see below), whose sum is σ = 370288800. Its totient is φ = 98355936.

The previous prime is 204138709. The next prime is 204138787. The reversal of 204138772 is 277831402.

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, 70383 + ... + 73225.

It is an arithmetic number, because the mean of its divisors is an integer number (15428700).

Almost surely, 2^204138772 is an apocalyptic number.

It is an amenable number.

204138772 is a deficient number, since it is larger than the sum of its proper divisors (166150028).

204138772 is a wasteful number, since it uses less digits than its factorization.

204138772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3495 (or 3493 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 34.

The square root of 204138772 is about 14287.7140228939. The cubic root of 204138772 is about 588.8099847976.

The spelling of 204138772 in words is "two hundred four million, one hundred thirty-eight thousand, seven hundred seventy-two".