345728691 has 48 divisors (see below), whose sum is σ = 644117760. Its totient is φ = 173396160.

The previous prime is 345728689. The next prime is 345728717. The reversal of 345728691 is 196827543.

It is not a de Polignac number, because 345728691 - 2¹ = 345728689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (345728681) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11496 + ... + 28698.

It is an arithmetic number, because the mean of its divisors is an integer number (13419120).

Almost surely, 2^345728691 is an apocalyptic number.

345728691 is a deficient number, since it is larger than the sum of its proper divisors (298389069).

345728691 is a wasteful number, since it uses less digits than its factorization.

345728691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17256 (or 17253 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 345728691 is about 18593.7809764448. The cubic root of 345728691 is about 701.8513516316.

The spelling of 345728691 in words is "three hundred forty-five million, seven hundred twenty-eight thousand, six hundred ninety-one".