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242317780 = 22512115889
BaseRepresentation
bin11100111000101…
…11100111010100
3121212222000111121
432130113213110
5444013132110
640013413324
76001444555
oct1634274724
9555860447
10242317780
11114866a31
126919a244
133b282b03
142427a32c
1516417cda
hexe7179d4

242317780 has 12 divisors (see below), whose sum is σ = 508867380. Its totient is φ = 96927104.

The previous prime is 242317769. The next prime is 242317781. The reversal of 242317780 is 87713242.

It can be written as a sum of positive squares in 2 ways, for example, as 85266756 + 157051024 = 9234^2 + 12532^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242317781) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6057925 + ... + 6057964.

It is an arithmetic number, because the mean of its divisors is an integer number (42405615).

Almost surely, 2242317780 is an apocalyptic number.

242317780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

242317780 is an abundant number, since it is smaller than the sum of its proper divisors (266549600).

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

242317780 is a wasteful number, since it uses less digits than its factorization.

242317780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12115898 (or 12115896 counting only the distinct ones).

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

The square root of 242317780 is about 15566.5596712954. The cubic root of 242317780 is about 623.4406181610.

The spelling of 242317780 in words is "two hundred forty-two million, three hundred seventeen thousand, seven hundred eighty".

Divisors: 1 2 4 5 10 20 12115889 24231778 48463556 60579445 121158890 242317780