205724942 has 8 divisors (see below), whose sum is σ = 308870496. Its totient is φ = 102768112.

The previous prime is 205724923. The next prime is 205724947. The reversal of 205724942 is 249427502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205724947) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44423 + ... + 48834.

It is an arithmetic number, because the mean of its divisors is an integer number (38608812).

Almost surely, 2^205724942 is an apocalyptic number.

205724942 is a deficient number, since it is larger than the sum of its proper divisors (103145554).

205724942 is a wasteful number, since it uses less digits than its factorization.

205724942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94362.

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 205724942 is about 14343.1147942140. The cubic root of 205724942 is about 590.3310810550.

The spelling of 205724942 in words is "two hundred five million, seven hundred twenty-four thousand, nine hundred forty-two".