340520430 has 64 divisors (see below), whose sum is σ = 847853568. Its totient is φ = 87434880.

The previous prime is 340520429. The next prime is 340520441. The reversal of 340520430 is 34025043.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 340520397 and 340520406.

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, 210304 + ... + 211916.

It is an arithmetic number, because the mean of its divisors is an integer number (13247712).

Almost surely, 2^340520430 is an apocalyptic number.

340520430 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 340520430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (423926784).

340520430 is an abundant number, since it is smaller than the sum of its proper divisors (507333138).

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

340520430 is a wasteful number, since it uses less digits than its factorization.

340520430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1881.

The product of its (nonzero) digits is 1440, while the sum is 21.

The square root of 340520430 is about 18453.1956582051. The cubic root of 340520430 is about 698.3091366630.

Adding to 340520430 its reverse (34025043), we get a palindrome (374545473).

The spelling of 340520430 in words is "three hundred forty million, five hundred twenty thousand, four hundred thirty".