242402220 has 72 divisors (see below), whose sum is σ = 762534864. Its totient is φ = 64639296.

The previous prime is 242402219. The next prime is 242402287. The reversal of 242402220 is 22204242.

242402220 is a `hidden beast` number, since 2 + 42 + 402 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 242402193 and 242402202.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20079 + ... + 29798.

It is an arithmetic number, because the mean of its divisors is an integer number (10590762).

Almost surely, 2^242402220 is an apocalyptic number.

242402220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

242402220 is an abundant number, since it is smaller than the sum of its proper divisors (520132644).

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

242402220 is a wasteful number, since it uses less digits than its factorization.

242402220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49901 (or 49887 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

The square root of 242402220 is about 15569.2716592652. The cubic root of 242402220 is about 623.5130261262.

Adding to 242402220 its reverse (22204242), we get a palindrome (264606462).

The spelling of 242402220 in words is "two hundred forty-two million, four hundred two thousand, two hundred twenty".