345815289 has 6 divisors (see below), whose sum is σ = 499510986. Its totient is φ = 230543520.

The previous prime is 345815287. The next prime is 345815293. The reversal of 345815289 is 982518543.

345815289 is a `hidden beast` number, since 3 + 45 + 81 + 528 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 341954064 + 3861225 = 18492^2 + 1965^2 .

It is not a de Polignac number, because 345815289 - 2¹ = 345815287 is a prime.

It is not an unprimeable number, because it can be changed into a prime (345815287) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19211952 + ... + 19211969.

It is an arithmetic number, because the mean of its divisors is an integer number (83251831).

Almost surely, 2^345815289 is an apocalyptic number.

It is an amenable number.

345815289 is a deficient number, since it is larger than the sum of its proper divisors (153695697).

345815289 is a wasteful number, since it uses less digits than its factorization.

345815289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38423927 (or 38423924 counting only the distinct ones).

The product of its digits is 345600, while the sum is 45.

The square root of 345815289 is about 18596.1095124760. The cubic root of 345815289 is about 701.9099465656.

The spelling of 345815289 in words is "three hundred forty-five million, eight hundred fifteen thousand, two hundred eighty-nine".