202343420440 has 96 divisors (see below), whose sum is σ = 531275235120. Its totient is φ = 69155826432.

The previous prime is 202343420423. The next prime is 202343420449. The reversal of 202343420440 is 44024343202.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 202343420399 and 202343420408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202343420449) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 458487 + ... + 784153.

Almost surely, 2^202343420440 is an apocalyptic number.

202343420440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 202343420440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (265637617560).

202343420440 is an abundant number, since it is smaller than the sum of its proper divisors (328931814680).

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

202343420440 is a wasteful number, since it uses less digits than its factorization.

202343420440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326009 (or 325998 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 28.

Adding to 202343420440 its reverse (44024343202), we get a palindrome (246367763642).

The spelling of 202343420440 in words is "two hundred two billion, three hundred forty-three million, four hundred twenty thousand, four hundred forty".