242538660 has 432 divisors, whose sum is σ = 978397056. Its totient is φ = 47443968.

The previous prime is 242538649. The next prime is 242538671. The reversal of 242538660 is 66835242.

242538660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (242538649) and next prime (242538671).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 3619947 + ... + 3620013.

It is an arithmetic number, because the mean of its divisors is an integer number (2264808).

Almost surely, 2^242538660 is an apocalyptic number.

242538660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 242538660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (489198528).

242538660 is an abundant number, since it is smaller than the sum of its proper divisors (735858396).

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

242538660 is a wasteful number, since it uses less digits than its factorization.

242538660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132 (or 114 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The square root of 242538660 is about 15573.6527507197. The cubic root of 242538660 is about 623.6299889726.

The spelling of 242538660 in words is "two hundred forty-two million, five hundred thirty-eight thousand, six hundred sixty".