240002420420 has 36 divisors (see below), whose sum is σ = 586291629420. Its totient is φ = 82286543808.

The previous prime is 240002420377. The next prime is 240002420431. The reversal of 240002420420 is 24024200042.

It can be written as a sum of positive squares in 2 ways, for example, as 79312077376 + 160690343044 = 281624^2 + 400862^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 240002420392 and 240002420401.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 122449235 + ... + 122451194.

It is an arithmetic number, because the mean of its divisors is an integer number (16285878595).

Almost surely, 2^240002420420 is an apocalyptic number.

240002420420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

240002420420 is an abundant number, since it is smaller than the sum of its proper divisors (346289209000).

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

240002420420 is a wasteful number, since it uses less digits than its factorization.

240002420420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244900452 (or 244900443 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

Adding to 240002420420 its reverse (24024200042), we get a palindrome (264026620462).

The spelling of 240002420420 in words is "two hundred forty billion, two million, four hundred twenty thousand, four hundred twenty".