242220406 has 16 divisors (see below), whose sum is σ = 379701504. Its totient is φ = 115669224.

The previous prime is 242220397. The next prime is 242220409. The reversal of 242220406 is 604022242.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242220409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29821 + ... + 37063.

It is an arithmetic number, because the mean of its divisors is an integer number (23731344).

Almost surely, 2^242220406 is an apocalyptic number.

242220406 is a deficient number, since it is larger than the sum of its proper divisors (137481098).

242220406 is a wasteful number, since it uses less digits than its factorization.

242220406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7995.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 242220406 is about 15563.4316909864. The cubic root of 242220406 is about 623.3570983024.

Adding to 242220406 its reverse (604022242), we get a palindrome (846242648).

The spelling of 242220406 in words is "two hundred forty-two million, two hundred twenty thousand, four hundred six".