204749742 has 32 divisors (see below), whose sum is σ = 414928800. Its totient is φ = 67350528.

The previous prime is 204749711. The next prime is 204749747. The reversal of 204749742 is 247947402.

It is a self number, because there is not a number n which added to its sum of digits gives 204749742.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204749747) 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, 219934 + ... + 220862.

It is an arithmetic number, because the mean of its divisors is an integer number (12966525).

Almost surely, 2^204749742 is an apocalyptic number.

204749742 is an abundant number, since it is smaller than the sum of its proper divisors (210179058).

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

204749742 is a wasteful number, since it uses less digits than its factorization.

204749742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1380.

The product of its (nonzero) digits is 112896, while the sum is 39.

The square root of 204749742 is about 14309.0790060017. The cubic root of 204749742 is about 589.3968191568.

The spelling of 204749742 in words is "two hundred four million, seven hundred forty-nine thousand, seven hundred forty-two".