242707428 has 42 divisors (see below), whose sum is σ = 636823334. Its totient is φ = 80901504.

The previous prime is 242707427. The next prime is 242707447. The reversal of 242707428 is 824707242.

It can be written as a sum of positive squares in only one way, i.e., 241864704 + 842724 = 15552^2 + 918^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 242707392 and 242707401.

It is not an unprimeable number, because it can be changed into a prime (242707427) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 38701 + ... + 44532.

Almost surely, 2^242707428 is an apocalyptic number.

It is an amenable number.

242707428 is an abundant number, since it is smaller than the sum of its proper divisors (394115906).

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

242707428 is an equidigital number, since it uses as much as digits as its factorization.

242707428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83255 (or 83238 counting only the distinct ones).

The product of its (nonzero) digits is 50176, while the sum is 36.

The square root of 242707428 is about 15579.0701904831. The cubic root of 242707428 is about 623.7746042452.

The spelling of 242707428 in words is "two hundred forty-two million, seven hundred seven thousand, four hundred twenty-eight".