340221316440 has 64 divisors (see below), whose sum is σ = 1020837945600. Its totient is φ = 90710218112.

The previous prime is 340221316439. The next prime is 340221316441. The reversal of 340221316440 is 44613122043.

It is an interprime number because it is at equal distance from previous prime (340221316439) and next prime (340221316441).

It is a super-2 number, since 2×340221316440² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 340221316398 and 340221316407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340221316441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 473989 + ... + 951371.

It is an arithmetic number, because the mean of its divisors is an integer number (15950592900).

Almost surely, 2^340221316440 is an apocalyptic number.

340221316440 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

340221316440 is an abundant number, since it is smaller than the sum of its proper divisors (680616629160).

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

340221316440 is a wasteful number, since it uses less digits than its factorization.

340221316440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483336 (or 483332 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

Adding to 340221316440 its reverse (44613122043), we get a palindrome (384834438483).

The spelling of 340221316440 in words is "three hundred forty billion, two hundred twenty-one million, three hundred sixteen thousand, four hundred forty".