340621605 has 112 divisors (see below), whose sum is σ = 679933440. Its totient is φ = 162860544.

The previous prime is 340621597. The next prime is 340621609. The reversal of 340621605 is 506126043.

340621605 is a `hidden beast` number, since 34 + 0 + 6 + 21 + 605 = 666.

It is not a de Polignac number, because 340621605 - 2³ = 340621597 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340621609) by changing a digit.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 1425076 + ... + 1425314.

Almost surely, 2^340621605 is an apocalyptic number.

It is an amenable number.

340621605 is a deficient number, since it is larger than the sum of its proper divisors (339311835).

340621605 is a wasteful number, since it uses less digits than its factorization.

340621605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302 (or 287 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 340621605 is about 18455.9368496969. The cubic root of 340621605 is about 698.3782900574.

Adding to 340621605 its reverse (506126043), we get a palindrome (846747648).

The spelling of 340621605 in words is "three hundred forty million, six hundred twenty-one thousand, six hundred five".