242400644 has 6 divisors (see below), whose sum is σ = 424201134. Its totient is φ = 121200320.

The previous prime is 242400643. The next prime is 242400649. The reversal of 242400644 is 446004242.

242400644 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 154753600 + 87647044 = 12440^2 + 9362^2 .

It is a super-2 number, since 2×242400644² = 117516144423229472, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (242400643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30300077 + ... + 30300084.

It is an arithmetic number, because the mean of its divisors is an integer number (70700189).

Almost surely, 2^242400644 is an apocalyptic number.

It is an amenable number.

242400644 is a deficient number, since it is larger than the sum of its proper divisors (181800490).

242400644 is a wasteful number, since it uses less digits than its factorization.

242400644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60600165 (or 60600163 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 26.

The square root of 242400644 is about 15569.2210466677. The cubic root of 242400644 is about 623.5116748478.

Adding to 242400644 its reverse (446004242), we get a palindrome (688404886).

The spelling of 242400644 in words is "two hundred forty-two million, four hundred thousand, six hundred forty-four".