242173780 has 24 divisors (see below), whose sum is σ = 526102920. Its totient is φ = 93528960.

The previous prime is 242173759. The next prime is 242173783. The reversal of 242173780 is 87371242.

It can be written as a sum of positive squares in 4 ways, for example, as 101324356 + 140849424 = 10066^2 + 11868^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242173783) 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, 208191 + ... + 209350.

It is an arithmetic number, because the mean of its divisors is an integer number (21920955).

Almost surely, 2^242173780 is an apocalyptic number.

242173780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

242173780 is an abundant number, since it is smaller than the sum of its proper divisors (283929140).

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

242173780 is a wasteful number, since it uses less digits than its factorization.

242173780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417579 (or 417577 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 34.

The square root of 242173780 is about 15561.9336844751. The cubic root of 242173780 is about 623.3170982137.

The spelling of 242173780 in words is "two hundred forty-two million, one hundred seventy-three thousand, seven hundred eighty".