204156342 has 32 divisors (see below), whose sum is σ = 488580960. Its totient is φ = 62817120.

The previous prime is 204156319. The next prime is 204156347. The reversal of 204156342 is 243651402.

204156342 is a `hidden beast` number, since 20 + 4 + 1 + 5 + 634 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204156347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 144709 + ... + 146112.

It is an arithmetic number, because the mean of its divisors is an integer number (15268155).

Almost surely, 2^204156342 is an apocalyptic number.

204156342 is an abundant number, since it is smaller than the sum of its proper divisors (284424618).

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

204156342 is a wasteful number, since it uses less digits than its factorization.

204156342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290845 (or 290839 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 204156342 is about 14288.3288735947. The cubic root of 204156342 is about 588.8268770560.

The spelling of 204156342 in words is "two hundred four million, one hundred fifty-six thousand, three hundred forty-two".