340420340 has 96 divisors (see below), whose sum is σ = 817931520. Its totient is φ = 117974016.

The previous prime is 340420303. The next prime is 340420351. The reversal of 340420340 is 43024043.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 676529 + ... + 677031.

It is an arithmetic number, because the mean of its divisors is an integer number (8520120).

Almost surely, 2^340420340 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 340420340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (408965760).

340420340 is an abundant number, since it is smaller than the sum of its proper divisors (477511180).

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

340420340 is a wasteful number, since it uses less digits than its factorization.

340420340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681 (or 679 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 20.

The square root of 340420340 is about 18450.4834625004. The cubic root of 340420340 is about 698.2407113896.

Adding to 340420340 its reverse (43024043), we get a palindrome (383444383).

The spelling of 340420340 in words is "three hundred forty million, four hundred twenty thousand, three hundred forty".