242638872 has 32 divisors (see below), whose sum is σ = 693254400. Its totient is φ = 69325344.

The previous prime is 242638843. The next prime is 242638889. The reversal of 242638872 is 278836242.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 721972 + ... + 722307.

It is an arithmetic number, because the mean of its divisors is an integer number (21664200).

Almost surely, 2^242638872 is an apocalyptic number.

It is an amenable number.

242638872 is an abundant number, since it is smaller than the sum of its proper divisors (450615528).

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

242638872 is a wasteful number, since it uses less digits than its factorization.

242638872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1444295 (or 1444291 counting only the distinct ones).

The product of its digits is 258048, while the sum is 42.

The square root of 242638872 is about 15576.8697754074. The cubic root of 242638872 is about 623.7158675197.

The spelling of 242638872 in words is "two hundred forty-two million, six hundred thirty-eight thousand, eight hundred seventy-two".