340201640 has 32 divisors (see below), whose sum is σ = 766250280. Its totient is φ = 135939072.

The previous prime is 340201613. The next prime is 340201691. The reversal of 340201640 is 46102043.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 324504196 + 15697444 = 18014^2 + 3962^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40004 + ... + 47756.

Almost surely, 2^340201640 is an apocalyptic number.

It is an amenable number.

340201640 is an abundant number, since it is smaller than the sum of its proper divisors (426048640).

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

340201640 is a wasteful number, since it uses less digits than its factorization.

340201640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8861 (or 8857 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 340201640 is about 18444.5558363437. Note that the first 3 decimals coincide. The cubic root of 340201640 is about 698.0911531928.

Adding to 340201640 its reverse (46102043), we get a palindrome (386303683).

The spelling of 340201640 in words is "three hundred forty million, two hundred one thousand, six hundred forty".