242247389 has 8 divisors (see below), whose sum is σ = 246220248. Its totient is φ = 238305600.

The previous prime is 242247371. The next prime is 242247391. The reversal of 242247389 is 983742242.

It can be written as a sum of positive squares in 4 ways, for example, as 25421764 + 216825625 = 5042^2 + 14725^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 242247389 - 2⁸ = 242247133 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242247319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8219 + ... + 23495.

It is an arithmetic number, because the mean of its divisors is an integer number (30777531).

Almost surely, 2^242247389 is an apocalyptic number.

It is an amenable number.

242247389 is a deficient number, since it is larger than the sum of its proper divisors (3972859).

242247389 is a wasteful number, since it uses less digits than its factorization.

242247389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15535.

The product of its digits is 193536, while the sum is 41.

The square root of 242247389 is about 15564.2985386429. The cubic root of 242247389 is about 623.3802444669.

It can be divided in two parts, 24224 and 7389, that added together give a palindrome (31613).

The spelling of 242247389 in words is "two hundred forty-two million, two hundred forty-seven thousand, three hundred eighty-nine".