345640518 has 48 divisors (see below), whose sum is σ = 763971936. Its totient is φ = 112907520.

The previous prime is 345640501. The next prime is 345640523. The reversal of 345640518 is 815046543.

It is a happy number.

345640518 is a `hidden beast` number, since 3 + 4 + 5 + 640 + 5 + 1 + 8 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 475071 + ... + 475797.

It is an arithmetic number, because the mean of its divisors is an integer number (15916082).

Almost surely, 2^345640518 is an apocalyptic number.

345640518 is an abundant number, since it is smaller than the sum of its proper divisors (418331418).

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

345640518 is a wasteful number, since it uses less digits than its factorization.

345640518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1229 (or 1226 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The square root of 345640518 is about 18591.4097905457. The cubic root of 345640518 is about 701.7916809491.

The spelling of 345640518 in words is "three hundred forty-five million, six hundred forty thousand, five hundred eighteen".