724188242 has 4 divisors (see below), whose sum is σ = 1086282366. Its totient is φ = 362094120.

The previous prime is 724188229. The next prime is 724188247. The reversal of 724188242 is 242881427.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 467900161 + 256288081 = 21631^2 + 16009^2 .

It is a junction number, because it is equal to n+sod(n) for n = 724188196 and 724188205.

It is not an unprimeable number, because it can be changed into a prime (724188247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 181047059 + ... + 181047062.

Almost surely, 2^724188242 is an apocalyptic number.

724188242 is a deficient number, since it is larger than the sum of its proper divisors (362094124).

724188242 is a wasteful number, since it uses less digits than its factorization.

724188242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362094123.

The product of its digits is 57344, while the sum is 38.

The square root of 724188242 is about 26910.7458462228. The cubic root of 724188242 is about 898.0154799804.

The spelling of 724188242 in words is "seven hundred twenty-four million, one hundred eighty-eight thousand, two hundred forty-two".