340204520 has 16 divisors (see below), whose sum is σ = 765460260. Its totient is φ = 136081792.

The previous prime is 340204507. The next prime is 340204537. The reversal of 340204520 is 25402043.

It can be written as a sum of positive squares in 2 ways, for example, as 296459524 + 43744996 = 17218^2 + 6614^2 .

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 = 340204492 and 340204501.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4252517 + ... + 4252596.

Almost surely, 2^340204520 is an apocalyptic number.

It is an amenable number.

340204520 is an abundant number, since it is smaller than the sum of its proper divisors (425255740).

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

340204520 is a wasteful number, since it uses less digits than its factorization.

340204520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8505124 (or 8505120 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 340204520 is about 18444.6339079961. The cubic root of 340204520 is about 698.0931230998.

Adding to 340204520 its reverse (25402043), we get a palindrome (365606563).

The spelling of 340204520 in words is "three hundred forty million, two hundred four thousand, five hundred twenty".