242820924 has 12 divisors (see below), whose sum is σ = 566582184. Its totient is φ = 80940304.

The previous prime is 242820917. The next prime is 242820971. The reversal of 242820924 is 429028242.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×242820924² = 117924002264427552, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10117527 + ... + 10117550.

It is an arithmetic number, because the mean of its divisors is an integer number (47215182).

Almost surely, 2^242820924 is an apocalyptic number.

It is an amenable number.

242820924 is an abundant number, since it is smaller than the sum of its proper divisors (323761260).

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

242820924 is a wasteful number, since it uses less digits than its factorization.

242820924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20235084 (or 20235082 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 33.

The square root of 242820924 is about 15582.7123441332. The cubic root of 242820924 is about 623.8718199075.

The spelling of 242820924 in words is "two hundred forty-two million, eight hundred twenty thousand, nine hundred twenty-four".