345240640 has 56 divisors (see below), whose sum is σ = 865388160. Its totient is φ = 130825728.

The previous prime is 345240619. The next prime is 345240647. The reversal of 345240640 is 46042543.

It is a junction number, because it is equal to n+sod(n) for n = 345240599 and 345240608.

It is not an unprimeable number, because it can be changed into a prime (345240647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22312 + ... + 34471.

It is an arithmetic number, because the mean of its divisors is an integer number (15453360).

Almost surely, 2^345240640 is an apocalyptic number.

It is an amenable number.

345240640 is an abundant number, since it is smaller than the sum of its proper divisors (520147520).

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

345240640 is a wasteful number, since it uses less digits than its factorization.

345240640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56819 (or 56809 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 28.

The square root of 345240640 is about 18580.6523028660. The cubic root of 345240640 is about 701.5209378589.

The spelling of 345240640 in words is "three hundred forty-five million, two hundred forty thousand, six hundred forty".