242189644 has 6 divisors (see below), whose sum is σ = 423831884. Its totient is φ = 121094820.

The previous prime is 242189641. The next prime is 242189659. The reversal of 242189644 is 446981242.

It is a junction number, because it is equal to n+sod(n) for n = 242189597 and 242189606.

It is not an unprimeable number, because it can be changed into a prime (242189641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30273702 + ... + 30273709.

Almost surely, 2^242189644 is an apocalyptic number.

It is an amenable number.

242189644 is a deficient number, since it is larger than the sum of its proper divisors (181642240).

242189644 is a wasteful number, since it uses less digits than its factorization.

242189644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60547415 (or 60547413 counting only the distinct ones).

The product of its digits is 110592, while the sum is 40.

The square root of 242189644 is about 15562.4433814231. The cubic root of 242189644 is about 623.3307083942.

The spelling of 242189644 in words is "two hundred forty-two million, one hundred eighty-nine thousand, six hundred forty-four".