345507816 has 32 divisors (see below), whose sum is σ = 864246240. Its totient is φ = 115105728.

The previous prime is 345507809. The next prime is 345507853. The reversal of 345507816 is 618705543.

345507816 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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, 64555 + ... + 69701.

It is an arithmetic number, because the mean of its divisors is an integer number (27007695).

Almost surely, 2^345507816 is an apocalyptic number.

It is an amenable number.

345507816 is an abundant number, since it is smaller than the sum of its proper divisors (518738424).

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

345507816 is a wasteful number, since it uses less digits than its factorization.

345507816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7953 (or 7949 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 39.

The square root of 345507816 is about 18587.8405416014. The cubic root of 345507816 is about 701.7018563329.

The spelling of 345507816 in words is "three hundred forty-five million, five hundred seven thousand, eight hundred sixteen".